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slide-1
SLIDE 1

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs✿ ❚❤❡♦r② ❛♥❞ ❆♣♣❧✐❝❛t✐♦♥

❇❛rt ▼❡♥♥✐♥❦ ❑❯ ▲❡✉✈❡♥ ✭❇❡❧❣✐✉♠✮

■❆❈❘ ❙❝❤♦♦❧ ♦♥ ❉❡s✐❣♥ ❛♥❞ ❙❡❝✉r✐t② ♦❢ ❈r②♣t♦❣r❛♣❤✐❝ ❆❧❣♦r✐t❤♠s ❛♥❞ ❉❡✈✐❝❡s ❖❝t♦❜❡r ✷✶✱ ✷✵✶✺

✶ ✴ ✺✷

slide-2
SLIDE 2

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs

m c

E

k ❚✇❡❛❦✿ ✢❡①✐❜✐❧✐t② t♦ t❤❡ ❝✐♣❤❡r ❊❛❝❤ t✇❡❛❦ ❣✐✈❡s ❞✐✛❡r❡♥t ♣❡r♠✉t❛t✐♦♥

✷ ✴ ✺✷

slide-3
SLIDE 3

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs

m t c k

  • E
  • ❚✇❡❛❦✿ ✢❡①✐❜✐❧✐t② t♦ t❤❡ ❝✐♣❤❡r
  • ❊❛❝❤ t✇❡❛❦ ❣✐✈❡s ❞✐✛❡r❡♥t ♣❡r♠✉t❛t✐♦♥

✷ ✴ ✺✷

slide-4
SLIDE 4

▼♦t✐✈❛t✐♦♥✿ ❖❈❇①

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T ˜ EN,A1

k

˜ EN,A2

k

˜ EN,Aa

k

˜ EN,M⊕

k

˜ EN,M1

k

˜ EN,M2

k

˜ EN,Md

k

  • ●❡♥❡r❛❧✐③❡❞ ❖❈❇ ❜② ❘♦❣❛✇❛② ❡t ❛❧✳ ❬❘❇❇❑✵✶✱❘♦❣✵✹✱❑❘✶✶❪
  • ■♥t❡r♥❛❧❧② ❜❛s❡❞ ♦♥ t✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r

E

  • ❚✇❡❛❦ (N, tweak) ✐s ✉♥✐q✉❡ ❢♦r ❡✈❡r② ❡✈❛❧✉❛t✐♦♥

❈❤❛♥❣❡ ♦❢ t✇❡❛❦ s❤♦✉❧❞ ❜❡ ❡✣❝✐❡♥t

❚✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ✇✐t❤ ❡✣❝✐❡♥t r❡✲t✇❡❛❦✐♥❣ ❡✣❝✐❡♥t ❆❊

✸ ✴ ✺✷

slide-5
SLIDE 5

▼♦t✐✈❛t✐♦♥✿ ❖❈❇①

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T ˜ EN,A1

k

˜ EN,A2

k

˜ EN,Aa

k

˜ EN,M⊕

k

˜ EN,M1

k

˜ EN,M2

k

˜ EN,Md

k

  • ●❡♥❡r❛❧✐③❡❞ ❖❈❇ ❜② ❘♦❣❛✇❛② ❡t ❛❧✳ ❬❘❇❇❑✵✶✱❘♦❣✵✹✱❑❘✶✶❪
  • ■♥t❡r♥❛❧❧② ❜❛s❡❞ ♦♥ t✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r

E

  • ❚✇❡❛❦ (N, tweak) ✐s ✉♥✐q✉❡ ❢♦r ❡✈❡r② ❡✈❛❧✉❛t✐♦♥
  • ❈❤❛♥❣❡ ♦❢ t✇❡❛❦ s❤♦✉❧❞ ❜❡ ❡✣❝✐❡♥t

❚✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ✇✐t❤ ❡✣❝✐❡♥t r❡✲t✇❡❛❦✐♥❣ ❡✣❝✐❡♥t ❆❊

✸ ✴ ✺✷

slide-6
SLIDE 6

▼♦t✐✈❛t✐♦♥✿ ❖❈❇①

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T ˜ EN,A1

k

˜ EN,A2

k

˜ EN,Aa

k

˜ EN,M⊕

k

˜ EN,M1

k

˜ EN,M2

k

˜ EN,Md

k

  • ●❡♥❡r❛❧✐③❡❞ ❖❈❇ ❜② ❘♦❣❛✇❛② ❡t ❛❧✳ ❬❘❇❇❑✵✶✱❘♦❣✵✹✱❑❘✶✶❪
  • ■♥t❡r♥❛❧❧② ❜❛s❡❞ ♦♥ t✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r

E

  • ❚✇❡❛❦ (N, tweak) ✐s ✉♥✐q✉❡ ❢♦r ❡✈❡r② ❡✈❛❧✉❛t✐♦♥
  • ❈❤❛♥❣❡ ♦❢ t✇❡❛❦ s❤♦✉❧❞ ❜❡ ❡✣❝✐❡♥t

❚✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ✇✐t❤ ❡✣❝✐❡♥t r❡✲t✇❡❛❦✐♥❣ = ⇒ ❡✣❝✐❡♥t ❆❊

✸ ✴ ✺✷

slide-7
SLIDE 7

▼♦t✐✈❛t✐♦♥✿ ❳❚❙

M1 M2 Md C1 C2 Cd ˜ E i,1

k

˜ E i,2

k

˜ E i,d

k

  • ❳❚❙ ♠♦❞❡ ❢♦r ❞✐s❦ ❡♥❝r②♣t✐♦♥
  • ❚✇❡❛❦ (i, j) = (s❡❝t♦r, ❜❧♦❝❦) ✉♥✐q✉❡ ❢♦r ❡✈❡r② ❜❧♦❝❦

❈❤❛♥❣❡ ♦❢ t✇❡❛❦ s❤♦✉❧❞ ❜❡ ❡✣❝✐❡♥t ✭❛s ❜❡❢♦r❡✮ ■♥❝r❡♠❡♥t❛❧✐t②✿ ❝❤❛♥❣❡ ✐♥ ♦♥❡ ✭♦r ❢❡✇✮ ❜❧♦❝❦s

❚✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ❢❛❝✐❧✐t❛t❡s ❊❈❇✲❧✐❦❡ ♠♦❞❡s ✐♥❝r❡♠❡♥t❛❧✐t②

✹ ✴ ✺✷

slide-8
SLIDE 8

▼♦t✐✈❛t✐♦♥✿ ❳❚❙

M1 M2 Md C1 C2 Cd ˜ E i,1

k

˜ E i,2

k

˜ E i,d

k

  • ❳❚❙ ♠♦❞❡ ❢♦r ❞✐s❦ ❡♥❝r②♣t✐♦♥
  • ❚✇❡❛❦ (i, j) = (s❡❝t♦r, ❜❧♦❝❦) ✉♥✐q✉❡ ❢♦r ❡✈❡r② ❜❧♦❝❦
  • ❈❤❛♥❣❡ ♦❢ t✇❡❛❦ s❤♦✉❧❞ ❜❡ ❡✣❝✐❡♥t ✭❛s ❜❡❢♦r❡✮

■♥❝r❡♠❡♥t❛❧✐t②✿ ❝❤❛♥❣❡ ✐♥ ♦♥❡ ✭♦r ❢❡✇✮ ❜❧♦❝❦s

❚✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ❢❛❝✐❧✐t❛t❡s ❊❈❇✲❧✐❦❡ ♠♦❞❡s ✐♥❝r❡♠❡♥t❛❧✐t②

✹ ✴ ✺✷

slide-9
SLIDE 9

▼♦t✐✈❛t✐♦♥✿ ❳❚❙

M1 M′

2 = M2

Md C1 C′

2

Cd ˜ E i,1

k

˜ E i,2

k

˜ E i,d

k

  • ❳❚❙ ♠♦❞❡ ❢♦r ❞✐s❦ ❡♥❝r②♣t✐♦♥
  • ❚✇❡❛❦ (i, j) = (s❡❝t♦r, ❜❧♦❝❦) ✉♥✐q✉❡ ❢♦r ❡✈❡r② ❜❧♦❝❦
  • ❈❤❛♥❣❡ ♦❢ t✇❡❛❦ s❤♦✉❧❞ ❜❡ ❡✣❝✐❡♥t ✭❛s ❜❡❢♦r❡✮
  • ■♥❝r❡♠❡♥t❛❧✐t②✿ ❝❤❛♥❣❡ ✐♥ ♦♥❡ ✭♦r ❢❡✇✮ ❜❧♦❝❦s

❚✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ❢❛❝✐❧✐t❛t❡s ❊❈❇✲❧✐❦❡ ♠♦❞❡s ✐♥❝r❡♠❡♥t❛❧✐t②

✹ ✴ ✺✷

slide-10
SLIDE 10

▼♦t✐✈❛t✐♦♥✿ ❳❚❙

M1 M′

2 = M2

Md C1 C′

2

Cd ˜ E i,1

k

˜ E i,2

k

˜ E i,d

k

  • ❳❚❙ ♠♦❞❡ ❢♦r ❞✐s❦ ❡♥❝r②♣t✐♦♥
  • ❚✇❡❛❦ (i, j) = (s❡❝t♦r, ❜❧♦❝❦) ✉♥✐q✉❡ ❢♦r ❡✈❡r② ❜❧♦❝❦
  • ❈❤❛♥❣❡ ♦❢ t✇❡❛❦ s❤♦✉❧❞ ❜❡ ❡✣❝✐❡♥t ✭❛s ❜❡❢♦r❡✮
  • ■♥❝r❡♠❡♥t❛❧✐t②✿ ❝❤❛♥❣❡ ✐♥ ♦♥❡ ✭♦r ❢❡✇✮ ❜❧♦❝❦s

❚✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ❢❛❝✐❧✐t❛t❡s ❊❈❇✲❧✐❦❡ ♠♦❞❡s = ⇒ ✐♥❝r❡♠❡♥t❛❧✐t②

✹ ✴ ✺✷

slide-11
SLIDE 11

▼♦t✐✈❛t✐♦♥✿ ❙❦❡✐♥

config M1 Mℓ iv h

· · · · · · ˜ Econ ˜ Emsg ˜ Emsg ˜ Eout

  • ❙❦❡✐♥ ❤❛s❤ ❢✉♥❝t✐♦♥ ❜② ❋❡r❣✉s♦♥ ❡t ❛❧✳ ❬❋▲❙✰✵✼❪
  • ❇❛s❡❞ ♦♥ ❚❤r❡❡✜s❤ t✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r
  • ❚✇❡❛❦s ✉s❡❞ ❢♦r ❞♦♠❛✐♥ s❡♣❛r❛t✐♦♥

❚✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ✐♥❞❡♣❡♥❞❡♥t✲❧♦♦❦✐♥❣ ❜❧♦❝❦❝✐♣❤❡rs

✺ ✴ ✺✷

slide-12
SLIDE 12

▼♦t✐✈❛t✐♦♥✿ ❙❦❡✐♥

config M1 Mℓ iv h

· · · · · · ˜ Econ ˜ Emsg ˜ Emsg ˜ Eout

  • ❙❦❡✐♥ ❤❛s❤ ❢✉♥❝t✐♦♥ ❜② ❋❡r❣✉s♦♥ ❡t ❛❧✳ ❬❋▲❙✰✵✼❪
  • ❇❛s❡❞ ♦♥ ❚❤r❡❡✜s❤ t✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r
  • ❚✇❡❛❦s ✉s❡❞ ❢♦r ❞♦♠❛✐♥ s❡♣❛r❛t✐♦♥

❚✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r = ⇒ ✐♥❞❡♣❡♥❞❡♥t✲❧♦♦❦✐♥❣ ❜❧♦❝❦❝✐♣❤❡rs

✺ ✴ ✺✷

slide-13
SLIDE 13

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❙❝r❛t❝❤

  • ❍❛st② P✉❞❞✐♥❣ ❈✐♣❤❡r ❬❙❝❤✾✽❪
  • ❆❊❙ s✉❜♠✐ss✐♦♥✱ ✏✜rst t✇❡❛❦❛❜❧❡ ❝✐♣❤❡r✑
  • ▼❡r❝② ❬❈r♦✵✶❪
  • ❉✐s❦ ❡♥❝r②♣t✐♦♥
  • ❚❤r❡❡✜s❤ ❬❋▲❙✰✵✼❪
  • ❙❍❆✲✸ s✉❜♠✐ss✐♦♥ ❙❦❡✐♥
  • ❚❲❊❆❑❊❨ ❬❏◆P✶✹❪
  • ❈❆❊❙❆❘ s✉❜♠✐ss✐♦♥s ❉❡♦①②s✱ ❏♦❧t✐❦✱ ❑■❆❙❯

❖✉r ❢♦❝✉s✿ ❣❡♥❡r✐❝ t✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ❞❡s✐❣♥

✻ ✴ ✺✷

slide-14
SLIDE 14

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❙❝r❛t❝❤

  • ❍❛st② P✉❞❞✐♥❣ ❈✐♣❤❡r ❬❙❝❤✾✽❪
  • ❆❊❙ s✉❜♠✐ss✐♦♥✱ ✏✜rst t✇❡❛❦❛❜❧❡ ❝✐♣❤❡r✑
  • ▼❡r❝② ❬❈r♦✵✶❪
  • ❉✐s❦ ❡♥❝r②♣t✐♦♥
  • ❚❤r❡❡✜s❤ ❬❋▲❙✰✵✼❪
  • ❙❍❆✲✸ s✉❜♠✐ss✐♦♥ ❙❦❡✐♥
  • ❚❲❊❆❑❊❨ ❬❏◆P✶✹❪
  • ❈❆❊❙❆❘ s✉❜♠✐ss✐♦♥s ❉❡♦①②s✱ ❏♦❧t✐❦✱ ❑■❆❙❯

❖✉r ❢♦❝✉s✿ ❣❡♥❡r✐❝ t✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r ❞❡s✐❣♥

✻ ✴ ✺✷

slide-15
SLIDE 15

❖✉t❧✐♥❡ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❙❡❝✉r✐t② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❊✣❝✐❡♥❝② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❈♦♥❝❧✉s✐♦♥

✼ ✴ ✺✷

slide-16
SLIDE 16

❖✉t❧✐♥❡ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❙❡❝✉r✐t② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❊✣❝✐❡♥❝② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❈♦♥❝❧✉s✐♦♥

✽ ✴ ✺✷

slide-17
SLIDE 17

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❇❧♦❝❦❝✐♣❤❡rs✴P❡r♠✉t❛t✐♦♥s

❇❧♦❝❦❝✐♣❤❡r ❇❛s❡❞✳

E

  • E

♣P❡r♠✉t❛t✐♦♥ ❇❛s❡❞✳♣

P

  • E

✾ ✴ ✺✷

slide-18
SLIDE 18

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❇❧♦❝❦❝✐♣❤❡rs

  • LRW1 ❛♥❞ LRW2 ❜② ▲✐s❦♦✈ ❡t ❛❧✳ ❬▲❘❲✵✷❪✿

m c t

E E

k k m c h(t) h(t)

E

k

  • h ✐s ❳❖❘✲✉♥✐✈❡rs❛❧ ❤❛s❤
  • ❊✳❣✳✱ h(t) = h ⊗ t ❢♦r n✲❜✐t ✏❦❡②✑ h

✶✵ ✴ ✺✷

slide-19
SLIDE 19

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❇❧♦❝❦❝✐♣❤❡rs

  • XE ❛♥❞ XEX ❜② ❘♦❣❛✇❛② ❬❘♦❣✵✹❪✿

m c 2α3β7γEk(N)

E

k m c 2α3β7γEk(N) 2α3β7γEk(N)

E

k

  • (α, β, γ, N) ✐s t✇❡❛❦ ✭s✐♠♣❧✐✜❡❞✮

❯s❡❞ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

  • ❡♥❡r❛❧✐③❡❞ ♠❛s❦✐♥❣✿

❈❤❛❦r❛❜♦rt② ❛♥❞ ❙❛r❦❛r ❬❈❙✵✻❪✿ ❢♦r ▲❋❙❘

  • r❛② ❝♦❞❡s ✭✉s❡❞ ✐♥ ❖❈❇✶ ❛♥❞ ❖❈❇✸✮

✶✶ ✴ ✺✷

slide-20
SLIDE 20

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❇❧♦❝❦❝✐♣❤❡rs

  • XE ❛♥❞ XEX ❜② ❘♦❣❛✇❛② ❬❘♦❣✵✹❪✿

m c 2α3β7γEk(N)

E

k m c 2α3β7γEk(N) 2α3β7γEk(N)

E

k

  • (α, β, γ, N) ✐s t✇❡❛❦ ✭s✐♠♣❧✐✜❡❞✮
  • ❯s❡❞ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙
  • ❡♥❡r❛❧✐③❡❞ ♠❛s❦✐♥❣✿

❈❤❛❦r❛❜♦rt② ❛♥❞ ❙❛r❦❛r ❬❈❙✵✻❪✿ ❢♦r ▲❋❙❘

  • r❛② ❝♦❞❡s ✭✉s❡❞ ✐♥ ❖❈❇✶ ❛♥❞ ❖❈❇✸✮

✶✶ ✴ ✺✷

slide-21
SLIDE 21

❊①❛♠♣❧❡✿ ❳❊❳ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

❖❈❇✷✿

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T ˜ EN,A1

k

˜ EN,A2

k

˜ EN,Aa

k

˜ EN,M⊕

k

˜ EN,M1

k

˜ EN,M2

k

˜ EN,Md

k

❳❚❙✿

✶✷ ✴ ✺✷

slide-22
SLIDE 22

❊①❛♠♣❧❡✿ ❳❊❳ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

❖❈❇✷✿

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T

2·32L 2232L 2a32L 2d3L 2L 22L 2dL 2L 22L 2dL

Ek Ek Ek Ek Ek Ek Ek

❳❚❙✿

✶✷ ✴ ✺✷

L = EK(N)

slide-23
SLIDE 23

❊①❛♠♣❧❡✿ ❳❊❳ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

❖❈❇✷✿

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T

2·32L 2232L 2a32L 2d3L 2L 22L 2dL 2L 22L 2dL

Ek Ek Ek Ek Ek Ek Ek

❳❚❙✿

✶✷ ✴ ✺✷

L = EK(N)

slide-24
SLIDE 24

❊①❛♠♣❧❡✿ ❳❊❳ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

❖❈❇✷✿

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T

2·32L 2232L 2a32L 2d3L 2L 22L 2dL 2L 22L 2dL

Ek Ek Ek Ek Ek Ek Ek

❳❚❙✿

✶✷ ✴ ✺✷

L = EK(N)

slide-25
SLIDE 25

❊①❛♠♣❧❡✿ ❳❊❳ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

❖❈❇✷✿

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T

2·32L 2232L 2a32L 2d3L 2L 22L 2dL 2L 22L 2dL

Ek Ek Ek Ek Ek Ek Ek

❳❚❙✿

✶✷ ✴ ✺✷

L = EK(N)

slide-26
SLIDE 26

❊①❛♠♣❧❡✿ ❳❊❳ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

❖❈❇✷✿

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T

2·32L 2232L 2a32L 2d3L 2L 22L 2dL 2L 22L 2dL

Ek Ek Ek Ek Ek Ek Ek

❳❚❙✿

✶✷ ✴ ✺✷

L = EK(N)

slide-27
SLIDE 27

❊①❛♠♣❧❡✿ ❳❊❳ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

❖❈❇✷✿

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T

2·32L 2232L 2a32L 2d3L 2L 22L 2dL 2L 22L 2dL

Ek Ek Ek Ek Ek Ek Ek

❳❚❙✿

M1 M2 Md C1 C2 Cd ˜ E i,1

k

˜ E i,2

k

˜ E i,d

k ✶✷ ✴ ✺✷

L = EK(N)

slide-28
SLIDE 28

❊①❛♠♣❧❡✿ ❳❊❳ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

❖❈❇✷✿

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T

2·32L 2232L 2a32L 2d3L 2L 22L 2dL 2L 22L 2dL

Ek Ek Ek Ek Ek Ek Ek

❳❚❙✿

M1 M2 Md C1 C2 Cd

2L 22L 2dL 2L 22L 2dL

Ek Ek Ek

✶✷ ✴ ✺✷

L = EK(N) L = EK(i)

slide-29
SLIDE 29

❊①❛♠♣❧❡✿ ❳❊❳ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙

❖❈❇✷✿

A1 A2 Aa M1 M2 Md ⊕Mi C1 C2 Cd T

2·32L 2232L 2a32L 2d3L 2L 22L 2dL 2L 22L 2dL

Ek Ek Ek Ek Ek Ek Ek

❳❚❙✿

M1 M2 Md C1 C2 Cd

2L 22L 2dL 2L 22L 2dL

Ek Ek Ek

✶✷ ✴ ✺✷

L = EK(N) L = EK(i)

slide-30
SLIDE 30

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❇❧♦❝❦❝✐♣❤❡rs

  • XE ❛♥❞ XEX ❜② ❘♦❣❛✇❛② ❬❘♦❣✵✹❪✿

m c 2α3β7γEk(N)

E

k m c 2α3β7γEk(N) 2α3β7γEk(N)

E

k

  • (α, β, γ, N) ✐s t✇❡❛❦ ✭s✐♠♣❧✐✜❡❞✮
  • ❯s❡❞ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙
  • ❡♥❡r❛❧✐③❡❞ ♠❛s❦✐♥❣✿

❈❤❛❦r❛❜♦rt② ❛♥❞ ❙❛r❦❛r ❬❈❙✵✻❪✿ ❢♦r ▲❋❙❘

  • r❛② ❝♦❞❡s ✭✉s❡❞ ✐♥ ❖❈❇✶ ❛♥❞ ❖❈❇✸✮

✶✸ ✴ ✺✷

slide-31
SLIDE 31

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❇❧♦❝❦❝✐♣❤❡rs

  • XE ❛♥❞ XEX ❜② ❘♦❣❛✇❛② ❬❘♦❣✵✹❪✿

m c 2α3β7γEk(N)

E

k m c 2α3β7γEk(N) 2α3β7γEk(N)

E

k

  • (α, β, γ, N) ✐s t✇❡❛❦ ✭s✐♠♣❧✐✜❡❞✮
  • ❯s❡❞ ✐♥ ❖❈❇✷ ❛♥❞ ❳❚❙
  • ●❡♥❡r❛❧✐③❡❞ ♠❛s❦✐♥❣✿
  • ❈❤❛❦r❛❜♦rt② ❛♥❞ ❙❛r❦❛r ❬❈❙✵✻❪✿ ϕα(Ek(N)) ❢♦r ▲❋❙❘ ϕ
  • ●r❛② ❝♦❞❡s ✭✉s❡❞ ✐♥ ❖❈❇✶ ❛♥❞ ❖❈❇✸✮

✶✸ ✴ ✺✷

slide-32
SLIDE 32

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ P❡r♠✉t❛t✐♦♥s

  • ▼✐♥❛❧♣❤❡r✬s TEM ❬❙❚❆✰✶✹❪✿

m c 2α3β7γ(kN ⊕ P(kN))

P

  • (α, β, γ, N) ✐s t✇❡❛❦ ✭s✐♠♣❧✐✜❡❞✮

✶✹ ✴ ✺✷

slide-33
SLIDE 33

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ P❡r♠✉t❛t✐♦♥s

  • Prøst ❬❑▲▲✰✶✹❪ ✉s❡s ❳❊✭❳✮ ✇✐t❤ ❊✈❡♥✲▼❛♥s♦✉r✿

m c 2α3β7γEk(0) 2α3β7γEk(0)

E

k

✇✐t❤ Ek(m) = P(m ⊕ k) ⊕ k

✶✺ ✴ ✺✷

slide-34
SLIDE 34

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ P❡r♠✉t❛t✐♦♥s

  • Prøst ❬❑▲▲✰✶✹❪ ✉s❡s ❳❊✭❳✮ ✇✐t❤ ❊✈❡♥✲▼❛♥s♦✉r✿

m c 2α3β7γEk(0) 2α3β7γEk(0)

E

k

✇✐t❤ Ek(m) = P(m ⊕ k) ⊕ k                   

m c (2α3β7γ ⊕ 1)k ⊕ 2α3β7γP(k)

P

✶✺ ✴ ✺✷

slide-35
SLIDE 35

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ✐♥ ❈❆❊❙❆❘

m c k

  • E

t m c 2α3β7γEk(N) 2α3β7γEk(N)

E

k m c 2α3β7γ(kN ⊕ P(kN))

P

❉❡❞✐❝❛t❡❞ ❳❊✴❳❊❳✲✐♥s♣✐r❡❞ ❚❊▼✲✐♥s♣✐r❡❞ ❉❡♦①②s✱ ❆❊❩✱ ❈❇❆✱ ❈❖❇❘❆✱ ▼✐♥❛❧♣❤❡r✱ ❏♦❧t✐❦✱ ❈❖P❆✱ ❊▲♠❉✱ ✐❋❡❡❞✱ Prøst ❑■❆❙❯✱ ▼❛r❜❧❡✱ ❖❈❇✱ ❖▼❉✱ ❙❈❘❊❆▼ ❖❚❘✱ P❖❊❚✱ ❙❍❊▲▲

✶✻ ✴ ✺✷

♣❧❛✐♥ ❂ ✜rst r♦✉♥❞✱ ❜♦❧❞ ❂ s❡❝♦♥❞ r♦✉♥❞

slide-36
SLIDE 36

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ✐♥ ❈❆❊❙❆❘

m c k

  • E

t m c 2α3β7γEk(N) 2α3β7γEk(N)

E

k m c 2α3β7γ(kN ⊕ P(kN))

P

❉❡❞✐❝❛t❡❞ ❳❊✴❳❊❳✲✐♥s♣✐r❡❞ ❚❊▼✲✐♥s♣✐r❡❞ ❉❡♦①②s✱ ❆❊❩✱ ❈❇❆✱ ❈❖❇❘❆✱ ▼✐♥❛❧♣❤❡r✱ ❏♦❧t✐❦✱ ❈❖P❆✱ ❊▲♠❉✱ ✐❋❡❡❞✱ Prøst ❑■❆❙❯✱ ▼❛r❜❧❡✱ ❖❈❇✱ ❖▼❉✱ ❙❈❘❊❆▼ ❖❚❘✱ P❖❊❚✱ ❙❍❊▲▲

✶✻ ✴ ✺✷

♣❧❛✐♥ ❂ ✜rst r♦✉♥❞✱ ❜♦❧❞ ❂ s❡❝♦♥❞ r♦✉♥❞

slide-37
SLIDE 37

❖✉t❧✐♥❡ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❙❡❝✉r✐t② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❊✣❝✐❡♥❝② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❈♦♥❝❧✉s✐♦♥

✶✼ ✴ ✺✷

slide-38
SLIDE 38

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ✐♥ ❈❆❊❙❆❘

m c k

  • E

t m c 2α3β7γEk(N) 2α3β7γEk(N)

E

k m c 2α3β7γ(kN ⊕ P(kN))

P

❉❡❞✐❝❛t❡❞ ❳❊✴❳❊❳✲✐♥s♣✐r❡❞ ❚❊▼✲✐♥s♣✐r❡❞ ❉❡♦①②s✱ ❆❊❩✱ ❈❇❆✱ ❈❖❇❘❆✱ ▼✐♥❛❧♣❤❡r✱ ❏♦❧t✐❦✱ ❈❖P❆✱ ❊▲♠❉✱ ✐❋❡❡❞✱ Prøst ❑■❆❙❯✱ ▼❛r❜❧❡✱ ❖❈❇✱ ❖▼❉✱ ❙❈❘❊❆▼ ❖❚❘✱ P❖❊❚✱ ❙❍❊▲▲

✶✽ ✴ ✺✷

❬▼❡♥✶✺❜❪✱ ❣❡♥❡r❛❧✐③❛t✐♦♥ ♦❢ t❤✐s

♣❧❛✐♥ ❂ ✜rst r♦✉♥❞✱ ❜♦❧❞ ❂ s❡❝♦♥❞ r♦✉♥❞

slide-39
SLIDE 39

❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ✐♥ ❈❆❊❙❆❘

m c k

  • E

t m c 2α3β7γEk(N) 2α3β7γEk(N)

E

k m c 2α3β7γ(kN ⊕ P(kN))

P

❉❡❞✐❝❛t❡❞ ❳❊✴❳❊❳✲✐♥s♣✐r❡❞ ❚❊▼✲✐♥s♣✐r❡❞ ❉❡♦①②s✱ ❆❊❩✱ ❈❇❆✱ ❈❖❇❘❆✱ ▼✐♥❛❧♣❤❡r✱ ❏♦❧t✐❦✱ ❈❖P❆✱ ❊▲♠❉✱ ✐❋❡❡❞✱ Prøst ❑■❆❙❯✱ ▼❛r❜❧❡✱ ❖❈❇✱ ❖▼❉✱ ❙❈❘❊❆▼ ❖❚❘✱ P❖❊❚✱ ❙❍❊▲▲

✶✽ ✴ ✺✷

XPX ❬▼❡♥✶✺❜❪✱ ❣❡♥❡r❛❧✐③❛t✐♦♥ ♦❢ t❤✐s

− − →

♣❧❛✐♥ ❂ ✜rst r♦✉♥❞✱ ❜♦❧❞ ❂ s❡❝♦♥❞ r♦✉♥❞

slide-40
SLIDE 40

❳P❳

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

❚✇❡❛❦ ❙❡t

  • (t11, t12, t21, t22) ❢r♦♠ s♦♠❡ t✇❡❛❦ s❡t T ⊆ ({0, 1}n)4
  • T ❝❛♥ ✭st✐❧❧✮ ❜❡ ❛♥② s❡t

❙❡❝✉r✐t② ♦❢ str♦♥❣❧② ❞❡♣❡♥❞s ♦♥ ❝❤♦✐❝❡ ♦❢

✶ ✏❙t✉♣✐❞✑

✐♥s❡❝✉r❡

✷ ✏◆♦r♠❛❧✑

s✐♥❣❧❡✲❦❡② s❡❝✉r❡

✸ ✏❙tr♦♥❣✑

r❡❧❛t❡❞✲❦❡② s❡❝✉r❡

✶✾ ✴ ✺✷

slide-41
SLIDE 41

❳P❳

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

❚✇❡❛❦ ❙❡t

  • (t11, t12, t21, t22) ❢r♦♠ s♦♠❡ t✇❡❛❦ s❡t T ⊆ ({0, 1}n)4
  • T ❝❛♥ ✭st✐❧❧✮ ❜❡ ❛♥② s❡t
  • ❙❡❝✉r✐t② ♦❢ XPX str♦♥❣❧② ❞❡♣❡♥❞s ♦♥ ❝❤♦✐❝❡ ♦❢ T

✶ ✏❙t✉♣✐❞✑

✐♥s❡❝✉r❡

✷ ✏◆♦r♠❛❧✑

s✐♥❣❧❡✲❦❡② s❡❝✉r❡

✸ ✏❙tr♦♥❣✑

r❡❧❛t❡❞✲❦❡② s❡❝✉r❡

✶✾ ✴ ✺✷

slide-42
SLIDE 42

❳P❳

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

❚✇❡❛❦ ❙❡t

  • (t11, t12, t21, t22) ❢r♦♠ s♦♠❡ t✇❡❛❦ s❡t T ⊆ ({0, 1}n)4
  • T ❝❛♥ ✭st✐❧❧✮ ❜❡ ❛♥② s❡t
  • ❙❡❝✉r✐t② ♦❢ XPX str♦♥❣❧② ❞❡♣❡♥❞s ♦♥ ❝❤♦✐❝❡ ♦❢ T

✶ ✏❙t✉♣✐❞✑ T

− → ✐♥s❡❝✉r❡

✷ ✏◆♦r♠❛❧✑

s✐♥❣❧❡✲❦❡② s❡❝✉r❡

✸ ✏❙tr♦♥❣✑

r❡❧❛t❡❞✲❦❡② s❡❝✉r❡

✶✾ ✴ ✺✷

slide-43
SLIDE 43

❳P❳

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

❚✇❡❛❦ ❙❡t

  • (t11, t12, t21, t22) ❢r♦♠ s♦♠❡ t✇❡❛❦ s❡t T ⊆ ({0, 1}n)4
  • T ❝❛♥ ✭st✐❧❧✮ ❜❡ ❛♥② s❡t
  • ❙❡❝✉r✐t② ♦❢ XPX str♦♥❣❧② ❞❡♣❡♥❞s ♦♥ ❝❤♦✐❝❡ ♦❢ T

✶ ✏❙t✉♣✐❞✑ T

− → ✐♥s❡❝✉r❡

✷ ✏◆♦r♠❛❧✑ T

− → s✐♥❣❧❡✲❦❡② s❡❝✉r❡

✸ ✏❙tr♦♥❣✑

r❡❧❛t❡❞✲❦❡② s❡❝✉r❡

✶✾ ✴ ✺✷

slide-44
SLIDE 44

❳P❳

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

❚✇❡❛❦ ❙❡t

  • (t11, t12, t21, t22) ❢r♦♠ s♦♠❡ t✇❡❛❦ s❡t T ⊆ ({0, 1}n)4
  • T ❝❛♥ ✭st✐❧❧✮ ❜❡ ❛♥② s❡t
  • ❙❡❝✉r✐t② ♦❢ XPX str♦♥❣❧② ❞❡♣❡♥❞s ♦♥ ❝❤♦✐❝❡ ♦❢ T

✶ ✏❙t✉♣✐❞✑ T

− → ✐♥s❡❝✉r❡

✷ ✏◆♦r♠❛❧✑ T

− → s✐♥❣❧❡✲❦❡② s❡❝✉r❡

✸ ✏❙tr♦♥❣✑ T

− → r❡❧❛t❡❞✲❦❡② s❡❝✉r❡

✶✾ ✴ ✺✷

slide-45
SLIDE 45

❳P❳✿ ❙t✉♣✐❞ ❚✇❡❛❦s

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

✏❱❛❧✐❞✑ ❚✇❡❛❦ ❙❡ts ❚❡❝❤♥✐❝❛❧ ❞❡✜♥✐t✐♦♥ t♦ ❡❧✐♠✐♥❛t❡ tr✐✈✐❛❧ ❝❛s❡s ■❢ ✐s ✐♥✈❛❧✐❞✱ t❤❡♥ ✐s ✐♥s❡❝✉r❡

✷✵ ✴ ✺✷

slide-46
SLIDE 46

❳P❳✿ ❙t✉♣✐❞ ❚✇❡❛❦s

m 0k ⊕ 0P(k) 0k ⊕ 0P(k)

P

(0, 0, 0, 0) ∈ T

✏❱❛❧✐❞✑ ❚✇❡❛❦ ❙❡ts ❚❡❝❤♥✐❝❛❧ ❞❡✜♥✐t✐♦♥ t♦ ❡❧✐♠✐♥❛t❡ tr✐✈✐❛❧ ❝❛s❡s ■❢ ✐s ✐♥✈❛❧✐❞✱ t❤❡♥ ✐s ✐♥s❡❝✉r❡

✷✵ ✴ ✺✷

slide-47
SLIDE 47

❳P❳✿ ❙t✉♣✐❞ ❚✇❡❛❦s

m P(m) 0k ⊕ 0P(k) 0k ⊕ 0P(k)

P

(0, 0, 0, 0) ∈ T = ⇒ XPXk((0, 0, 0, 0), m) = P(m)

✏❱❛❧✐❞✑ ❚✇❡❛❦ ❙❡ts ❚❡❝❤♥✐❝❛❧ ❞❡✜♥✐t✐♦♥ t♦ ❡❧✐♠✐♥❛t❡ tr✐✈✐❛❧ ❝❛s❡s ■❢ ✐s ✐♥✈❛❧✐❞✱ t❤❡♥ ✐s ✐♥s❡❝✉r❡

✷✵ ✴ ✺✷

slide-48
SLIDE 48

❳P❳✿ ❙t✉♣✐❞ ❚✇❡❛❦s

k 1k ⊕ 0P(k) 1k ⊕ 1P(k)

P

(0, 0, 0, 0) ∈ T = ⇒ XPXk((0, 0, 0, 0), m) = P(m) (1, 0, 1, 1) ∈ T = ⇒ XPXk((1, 0, 1, 1), 0) = k

✏❱❛❧✐❞✑ ❚✇❡❛❦ ❙❡ts ❚❡❝❤♥✐❝❛❧ ❞❡✜♥✐t✐♦♥ t♦ ❡❧✐♠✐♥❛t❡ tr✐✈✐❛❧ ❝❛s❡s ■❢ ✐s ✐♥✈❛❧✐❞✱ t❤❡♥ ✐s ✐♥s❡❝✉r❡

✷✵ ✴ ✺✷

slide-49
SLIDE 49

❳P❳✿ ❙t✉♣✐❞ ❚✇❡❛❦s

3P(k) 1k ⊕ 0P(k) 0k ⊕ 2P(k)

P

(0, 0, 0, 0) ∈ T = ⇒ XPXk((0, 0, 0, 0), m) = P(m) (1, 0, 1, 1) ∈ T = ⇒ XPXk((1, 0, 1, 1), 0) = k (1, 0, 0, 2) ∈ T = ⇒ XPXk((1, 0, 0, 2), 0) = 3P(k)

✏❱❛❧✐❞✑ ❚✇❡❛❦ ❙❡ts ❚❡❝❤♥✐❝❛❧ ❞❡✜♥✐t✐♦♥ t♦ ❡❧✐♠✐♥❛t❡ tr✐✈✐❛❧ ❝❛s❡s ■❢ ✐s ✐♥✈❛❧✐❞✱ t❤❡♥ ✐s ✐♥s❡❝✉r❡

✷✵ ✴ ✺✷

slide-50
SLIDE 50

❳P❳✿ ❙t✉♣✐❞ ❚✇❡❛❦s

3P(k) 1k ⊕ 0P(k) 0k ⊕ 2P(k)

P

(0, 0, 0, 0) ∈ T = ⇒ XPXk((0, 0, 0, 0), m) = P(m) (1, 0, 1, 1) ∈ T = ⇒ XPXk((1, 0, 1, 1), 0) = k (1, 0, 0, 2) ∈ T = ⇒ XPXk((1, 0, 0, 2), 0) = 3P(k) · · · · · · · · ·

✏❱❛❧✐❞✑ ❚✇❡❛❦ ❙❡ts ❚❡❝❤♥✐❝❛❧ ❞❡✜♥✐t✐♦♥ t♦ ❡❧✐♠✐♥❛t❡ tr✐✈✐❛❧ ❝❛s❡s ■❢ ✐s ✐♥✈❛❧✐❞✱ t❤❡♥ ✐s ✐♥s❡❝✉r❡

✷✵ ✴ ✺✷

slide-51
SLIDE 51

❳P❳✿ ❙t✉♣✐❞ ❚✇❡❛❦s

3P(k) 1k ⊕ 0P(k) 0k ⊕ 2P(k)

P

(0, 0, 0, 0) ∈ T = ⇒ XPXk((0, 0, 0, 0), m) = P(m) (1, 0, 1, 1) ∈ T = ⇒ XPXk((1, 0, 1, 1), 0) = k (1, 0, 0, 2) ∈ T = ⇒ XPXk((1, 0, 0, 2), 0) = 3P(k) · · · · · · · · ·

✏❱❛❧✐❞✑ ❚✇❡❛❦ ❙❡ts

  • ❚❡❝❤♥✐❝❛❧ ❞❡✜♥✐t✐♦♥ t♦ ❡❧✐♠✐♥❛t❡ tr✐✈✐❛❧ ❝❛s❡s

■❢ ✐s ✐♥✈❛❧✐❞✱ t❤❡♥ ✐s ✐♥s❡❝✉r❡

✷✵ ✴ ✺✷

slide-52
SLIDE 52

❳P❳✿ ❙t✉♣✐❞ ❚✇❡❛❦s

3P(k) 1k ⊕ 0P(k) 0k ⊕ 2P(k)

P

(0, 0, 0, 0) ∈ T = ⇒ XPXk((0, 0, 0, 0), m) = P(m) (1, 0, 1, 1) ∈ T = ⇒ XPXk((1, 0, 1, 1), 0) = k (1, 0, 0, 2) ∈ T = ⇒ XPXk((1, 0, 0, 2), 0) = 3P(k) · · · · · · · · ·

✏❱❛❧✐❞✑ ❚✇❡❛❦ ❙❡ts

  • ❚❡❝❤♥✐❝❛❧ ❞❡✜♥✐t✐♦♥ t♦ ❡❧✐♠✐♥❛t❡ tr✐✈✐❛❧ ❝❛s❡s
  • ■❢ T ✐s ✐♥✈❛❧✐❞✱ t❤❡♥ XPX ✐s ✐♥s❡❝✉r❡

✷✵ ✴ ✺✷

slide-53
SLIDE 53

❳P❳✿ ◆♦r♠❛❧ ❛♥❞ ❙tr♦♥❣ ❚✇❡❛❦s

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t②

  • ■❢ T ✐s ✈❛❧✐❞✱ t❤❡♥ XPX ✐s ❙❚P❘P

✲❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ✭❙✐♠♣❧✐✜❡❞✮ ❝❛♥ ✐♥✢✉❡♥❝❡ ❦❡②✿ ✲❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ✭❙✐♠♣❧✐✜❡❞✮ ❝❛♥ ✐♥✢✉❡♥❝❡ ❦❡②✿ ♦r ◆♦t❡✿ ♠❛s❦✐♥❣s ✐♥ ❛r❡

✐❢ ✐s ✈❛❧✐❞✱ ❛♥❞ ❢♦r ❛❧❧ t✇❡❛❦s✿ s❡❝✉r✐t② ❛♥❞ ✲r❦✲❙❚P❘P ✲r❦✲❙❚P❘P

✷✶ ✴ ✺✷

slide-54
SLIDE 54

❳P❳✿ ◆♦r♠❛❧ ❛♥❞ ❙tr♦♥❣ ❚✇❡❛❦s

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t②

  • ■❢ T ✐s ✈❛❧✐❞✱ t❤❡♥ XPX ✐s ❙❚P❘P

Φ⊕✲❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ✭❙✐♠♣❧✐✜❡❞✮

  • D ❝❛♥ ✐♥✢✉❡♥❝❡ ❦❡②✿ k → k ⊕ δ

✲❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ✭❙✐♠♣❧✐✜❡❞✮ ❝❛♥ ✐♥✢✉❡♥❝❡ ❦❡②✿ ♦r ◆♦t❡✿ ♠❛s❦✐♥❣s ✐♥ ❛r❡

✐❢ ✐s ✈❛❧✐❞✱ ❛♥❞ ❢♦r ❛❧❧ t✇❡❛❦s✿ s❡❝✉r✐t② ❛♥❞ ✲r❦✲❙❚P❘P ✲r❦✲❙❚P❘P

✷✶ ✴ ✺✷

slide-55
SLIDE 55

❳P❳✿ ◆♦r♠❛❧ ❛♥❞ ❙tr♦♥❣ ❚✇❡❛❦s

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t②

  • ■❢ T ✐s ✈❛❧✐❞✱ t❤❡♥ XPX ✐s ❙❚P❘P

Φ⊕✲❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ✭❙✐♠♣❧✐✜❡❞✮

  • D ❝❛♥ ✐♥✢✉❡♥❝❡ ❦❡②✿ k → k ⊕ δ

ΦP⊕✲❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ✭❙✐♠♣❧✐✜❡❞✮

  • D ❝❛♥ ✐♥✢✉❡♥❝❡ ❦❡②✿ k → k ⊕ δ ♦r P(k) → P(k) ⊕ ǫ
  • ◆♦t❡✿ ♠❛s❦✐♥❣s ✐♥ XPX ❛r❡ ti1k ⊕ ti2P(k)

✐❢ ✐s ✈❛❧✐❞✱ ❛♥❞ ❢♦r ❛❧❧ t✇❡❛❦s✿ s❡❝✉r✐t② ❛♥❞ ✲r❦✲❙❚P❘P ✲r❦✲❙❚P❘P

✷✶ ✴ ✺✷

slide-56
SLIDE 56

❳P❳✿ ◆♦r♠❛❧ ❛♥❞ ❙tr♦♥❣ ❚✇❡❛❦s

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t②

  • ■❢ T ✐s ✈❛❧✐❞✱ t❤❡♥ XPX ✐s ❙❚P❘P

Φ⊕✲❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ✭❙✐♠♣❧✐✜❡❞✮

  • D ❝❛♥ ✐♥✢✉❡♥❝❡ ❦❡②✿ k → k ⊕ δ

ΦP⊕✲❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ✭❙✐♠♣❧✐✜❡❞✮

  • D ❝❛♥ ✐♥✢✉❡♥❝❡ ❦❡②✿ k → k ⊕ δ ♦r P(k) → P(k) ⊕ ǫ
  • ◆♦t❡✿ ♠❛s❦✐♥❣s ✐♥ XPX ❛r❡ ti1k ⊕ ti2P(k)

✐❢ T ✐s ✈❛❧✐❞✱ ❛♥❞ ❢♦r ❛❧❧ t✇❡❛❦s✿ s❡❝✉r✐t② t12, t22 = 0 ❛♥❞ (t21, t22) = (0, 1) Φ⊕✲r❦✲❙❚P❘P t11, t12, t21, t22 = 0 ΦP ⊕✲r❦✲❙❚P❘P

✷✶ ✴ ✺✷

slide-57
SLIDE 57

❳P❳ ❈♦✈❡rs ❊✈❡♥✲▼❛♥s♦✉r

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

− − →

m c k k

P

❢♦r T = {(1, 0, 1, 0)} ❙✐♥❣❧❡✲❦❡② ❙❚P❘P s❡❝✉r❡ ✭s✉r♣r✐s❡❄✮

  • ❡♥❡r❛❧❧②✱ ✐❢

✱ ✐s ❛ ♥♦r♠❛❧ ❜❧♦❝❦❝✐♣❤❡r

✷✷ ✴ ✺✷

slide-58
SLIDE 58

❳P❳ ❈♦✈❡rs ❊✈❡♥✲▼❛♥s♦✉r

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

− − →

m c k k

P

❢♦r T = {(1, 0, 1, 0)}

  • ❙✐♥❣❧❡✲❦❡② ❙❚P❘P s❡❝✉r❡ ✭s✉r♣r✐s❡❄✮
  • ❡♥❡r❛❧❧②✱ ✐❢

✱ ✐s ❛ ♥♦r♠❛❧ ❜❧♦❝❦❝✐♣❤❡r

✷✷ ✴ ✺✷

slide-59
SLIDE 59

❳P❳ ❈♦✈❡rs ❊✈❡♥✲▼❛♥s♦✉r

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

− − →

m c k k

P

❢♦r T = {(1, 0, 1, 0)}

  • ❙✐♥❣❧❡✲❦❡② ❙❚P❘P s❡❝✉r❡ ✭s✉r♣r✐s❡❄✮
  • ●❡♥❡r❛❧❧②✱ ✐❢ |T | = 1✱ XPX ✐s ❛ ♥♦r♠❛❧ ❜❧♦❝❦❝✐♣❤❡r

✷✷ ✴ ✺✷

slide-60
SLIDE 60

❳P❳ ❈♦✈❡rs ❳❊❳ ❲✐t❤ ❊✈❡♥✲▼❛♥s♦✉r

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

− − →

m c (2α3β7γ ⊕ 1)k ⊕ 2α3β7γP(k)

P

❢♦r T = ( 2α3β7γ ⊕ 1 , 2α3β7γ , ( 2α3β7γ ⊕ 1 , 2α3β7γ )

  • (α, β, γ) ∈ {XEX✲t✇❡❛❦s}
  • (α, β, γ) ✐s ✐♥ ❢❛❝t t❤❡ ✏r❡❛❧✑ t✇❡❛❦

✲r❦ ❙❚P❘P s❡❝✉r❡ ✭✐❢ ✮

✷✸ ✴ ✺✷

slide-61
SLIDE 61

❳P❳ ❈♦✈❡rs ❳❊❳ ❲✐t❤ ❊✈❡♥✲▼❛♥s♦✉r

m c t11k ⊕ t12P(k) t21k ⊕ t22P(k)

P

− − →

m c (2α3β7γ ⊕ 1)k ⊕ 2α3β7γP(k)

P

❢♦r T = ( 2α3β7γ ⊕ 1 , 2α3β7γ , ( 2α3β7γ ⊕ 1 , 2α3β7γ )

  • (α, β, γ) ∈ {XEX✲t✇❡❛❦s}
  • (α, β, γ) ✐s ✐♥ ❢❛❝t t❤❡ ✏r❡❛❧✑ t✇❡❛❦
  • ΦP⊕✲r❦ ❙❚P❘P s❡❝✉r❡ ✭✐❢ 2α3β7γ = 1✮

✷✸ ✴ ✺✷

slide-62
SLIDE 62

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ ❈❖P❆

A1 A2 Aa−1 Aa M1 M2 Md M1⊕···⊕Md C1 C2 Cd T

33L 2·33L 2a-233L 2a-134L L 3L 2·3L 2d-13L 2d-132L 2L 22L 2dL 2d-17L

Ek Ek Ek Ek Ek Ek Ek Ek Ek Ek Ek Ek

  • ❇② ❆♥❞r❡❡✈❛ ❡t ❛❧✳ ❬❆❇▲✰✶✹❪
  • ■♠♣❧✐❝✐t❧② ❜❛s❡❞ ♦♥ XEX ❜❛s❡❞ ♦♥ ❆❊❙

Prøst✲❈❖P❆ ❜② ❑❛✈✉♥ ❡t ❛❧✳ ❬❑▲▲✰✶✹❪✿ ❈❖P❆ ❜❛s❡❞ ♦♥ ❳❊❳ ❜❛s❡❞ ♦♥ ❊✈❡♥✲▼❛♥s♦✉r

✷✹ ✴ ✺✷

L = EK(0)

slide-63
SLIDE 63

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ ❈❖P❆

A1 A2 Aa−1 Aa M1 M2 Md M1⊕···⊕Md C1 C2 Cd T

33L 2·33L 2a-233L 2a-134L L 3L 2·3L 2d-13L 2d-132L 2L 22L 2dL 2d-17L

Ek Ek Ek Ek Ek Ek Ek Ek Ek Ek Ek Ek

  • ❇② ❆♥❞r❡❡✈❛ ❡t ❛❧✳ ❬❆❇▲✰✶✹❪
  • ■♠♣❧✐❝✐t❧② ❜❛s❡❞ ♦♥ XEX ❜❛s❡❞ ♦♥ ❆❊❙
  • Prøst✲❈❖P❆ ❜② ❑❛✈✉♥ ❡t ❛❧✳ ❬❑▲▲✰✶✹❪✿

❈❖P❆ ❜❛s❡❞ ♦♥ ❳❊❳ ❜❛s❡❞ ♦♥ ❊✈❡♥✲▼❛♥s♦✉r

✷✹ ✴ ✺✷

L = EK(0)

slide-64
SLIDE 64

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ ❈❖P❆

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t② ♦❢ ❈❖P❆ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

s❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

s❦

✳ ✳ E

s❦

✳ ✳ ❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ♦❢ ❈❖P❆ ❆♣♣r♦❛❝❤ ❣❡♥❡r❛❧✐③❡s ❢♦r ❛♥② ✭♣r♦♦❢ ✐♥ ❬▼❡♥✶✺❜❪✮ ✳ ✳ ❈❖P❆

✲r❦

✳ ✳

✲r❦

✳ ✳

✲r❦

✳ ✳

✷✺ ✴ ✺✷

slide-65
SLIDE 65

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ ❈❖P❆

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t② ♦❢ ❈❖P❆ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

s❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

s❦

✳ ✳ E

s❦

✳ ✳ ❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ♦❢ ❈❖P❆

  • ❆♣♣r♦❛❝❤ ❣❡♥❡r❛❧✐③❡s ❢♦r ❛♥② Φ ✭♣r♦♦❢ ✐♥ ❬▼❡♥✶✺❜❪✮

✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ E

✲r❦

✳ ✳

✷✺ ✴ ✺✷

slide-66
SLIDE 66

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ Prøst✲❈❖P❆

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

s❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

s❦

✳ ✳ E

s❦

✳ ✳ P ❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ❆♣♣r♦❛❝❤ ❣❡♥❡r❛❧✐③❡s ✭♣r♦♦❢ ✐♥ ❬▼❡♥✶✺❜❪✮ ✳ ✳ ❈❖P❆

✲r❦

✳ ✳

✲r❦

✳ ✳

✲r❦

✳ ✳

✷✻ ✴ ✺✷

✲r❦

slide-67
SLIDE 67

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ Prøst✲❈❖P❆

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

s❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

s❦

✳ ✳ E

O

  • σ2

2n

− − − →

s❦

✳ ✳ P ❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ❆♣♣r♦❛❝❤ ❣❡♥❡r❛❧✐③❡s ✭♣r♦♦❢ ✐♥ ❬▼❡♥✶✺❜❪✮ ✳ ✳ ❈❖P❆

✲r❦

✳ ✳

✲r❦

✳ ✳

✲r❦

✳ ✳

✷✻ ✴ ✺✷

✲r❦

slide-68
SLIDE 68

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ Prøst✲❈❖P❆

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

s❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

s❦

✳ ✳ E

O

  • σ2

2n

− − − →

s❦

✳ ✳ P ❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ❆♣♣r♦❛❝❤ ❣❡♥❡r❛❧✐③❡s ✭♣r♦♦❢ ✐♥ ❬▼❡♥✶✺❜❪✮ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ E

✲r❦

✳ ✳ P

✷✻ ✴ ✺✷

✲r❦

slide-69
SLIDE 69

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ Prøst✲❈❖P❆

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

s❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

s❦

✳ ✳ E

O

  • σ2

2n

− − − →

s❦

✳ ✳ P ❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ❆♣♣r♦❛❝❤ ❣❡♥❡r❛❧✐③❡s ✭♣r♦♦❢ ✐♥ ❬▼❡♥✶✺❜❪✮ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ E

  • 1

− − − →

Φ✲r❦

✳ ✳ P

✷✻ ✴ ✺✷

✲r❦

slide-70
SLIDE 70

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ Prøst✲❈❖P❆

❙✐♥❣❧❡✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

s❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

s❦

✳ ✳ E

O

  • σ2

2n

− − − →

s❦

✳ ✳ P ❘❡❧❛t❡❞✲❑❡② ❙❡❝✉r✐t② ♦❢ Prøst✲❈❖P❆ ❆♣♣r♦❛❝❤ ❣❡♥❡r❛❧✐③❡s ✭♣r♦♦❢ ✐♥ ❬▼❡♥✶✺❜❪✮ ✳ ✳ ❈❖P❆

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ XEX

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ E

  • 1

− − − →

Φ✲r❦

✳ ✳ P

✷✻ ✴ ✺✷

O

  • σ2

2n

  • ΦP ⊕✲r❦
slide-71
SLIDE 71

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ ▼✐♥❛❧♣❤❡r

A1 A2 Aa−1 Aa M1 M2 Md−1 Md C1 C2 Cd−1 Cd T

2L′ 2L′ 22L′ 22L′ 2a-1L′ 2a-1L′ 2a-13L′ 2a-13L′ 2L 2L 23L 23L 22d-3L 22d-3L 22d-1L 22d-1L 22L 22L 24L 24L 22d-2L 22d-2L 22d-13L 22d-13L

P P P P P P P P P P P P

  • ❇② ❙❛s❛❦✐ ❡t ❛❧✳ ❬❙❚❆✰✶✹❪
  • ❊①tr❛ ♥♦♥❝❡ N ❝♦♥❝❛t❡♥❛t❡❞ t♦ k

❇❛s❡❞ ♦♥ ✇✐t❤ ✳ ✳ ▼✐♥❛❧♣❤✳

✲r❦

✳ ✳

✲r❦

✳ ✳

✷✼ ✴ ✺✷

L′ = kflag0 ⊕ P(kflag0) L = kflagN ⊕ P(kflagN)

slide-72
SLIDE 72

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ ▼✐♥❛❧♣❤❡r

A1 A2 Aa−1 Aa M1 M2 Md−1 Md C1 C2 Cd−1 Cd T

2L′ 2L′ 22L′ 22L′ 2a-1L′ 2a-1L′ 2a-13L′ 2a-13L′ 2L 2L 23L 23L 22d-3L 22d-3L 22d-1L 22d-1L 22L 22L 24L 24L 22d-2L 22d-2L 22d-13L 22d-13L

P P P P P P P P P P P P

  • ❇② ❙❛s❛❦✐ ❡t ❛❧✳ ❬❙❚❆✰✶✹❪
  • ❊①tr❛ ♥♦♥❝❡ N ❝♦♥❝❛t❡♥❛t❡❞ t♦ k
  • ❇❛s❡❞ ♦♥ XPX ✇✐t❤ T = {(2α3β, 2α3β, 2α3β, 2α3β)}

✳ ✳ ▼✐♥❛❧♣❤✳

✲r❦

✳ ✳

✲r❦

✳ ✳

✷✼ ✴ ✺✷

L′ = kflag0 ⊕ P(kflag0) L = kflagN ⊕ P(kflagN)

slide-73
SLIDE 73

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ ▼✐♥❛❧♣❤❡r

A1 A2 Aa−1 Aa M1 M2 Md−1 Md C1 C2 Cd−1 Cd T

2L′ 2L′ 22L′ 22L′ 2a-1L′ 2a-1L′ 2a-13L′ 2a-13L′ 2L 2L 23L 23L 22d-3L 22d-3L 22d-1L 22d-1L 22L 22L 24L 24L 22d-2L 22d-2L 22d-13L 22d-13L

P P P P P P P P P P P P

  • ❇② ❙❛s❛❦✐ ❡t ❛❧✳ ❬❙❚❆✰✶✹❪
  • ❊①tr❛ ♥♦♥❝❡ N ❝♦♥❝❛t❡♥❛t❡❞ t♦ k
  • ❇❛s❡❞ ♦♥ XPX ✇✐t❤ T = {(2α3β, 2α3β, 2α3β, 2α3β)}

✳ ✳ ▼✐♥❛❧♣❤✳

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ XPX

✲r❦

✳ ✳ P

✷✼ ✴ ✺✷

L′ = kflag0 ⊕ P(kflag0) L = kflagN ⊕ P(kflagN)

slide-74
SLIDE 74

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ❆❊✿ ▼✐♥❛❧♣❤❡r

A1 A2 Aa−1 Aa M1 M2 Md−1 Md C1 C2 Cd−1 Cd T

2L′ 2L′ 22L′ 22L′ 2a-1L′ 2a-1L′ 2a-13L′ 2a-13L′ 2L 2L 23L 23L 22d-3L 22d-3L 22d-1L 22d-1L 22L 22L 24L 24L 22d-2L 22d-2L 22d-13L 22d-13L

P P P P P P P P P P P P

  • ❇② ❙❛s❛❦✐ ❡t ❛❧✳ ❬❙❚❆✰✶✹❪
  • ❊①tr❛ ♥♦♥❝❡ N ❝♦♥❝❛t❡♥❛t❡❞ t♦ k
  • ❇❛s❡❞ ♦♥ XPX ✇✐t❤ T = {(2α3β, 2α3β, 2α3β, 2α3β)}

✳ ✳ ▼✐♥❛❧♣❤✳

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ XPX

O

  • σ2

2n

− − − →

ΦP ⊕✲r❦

✳ ✳ P

✷✼ ✴ ✺✷

L′ = kflag0 ⊕ P(kflag0) L = kflagN ⊕ P(kflagN)

slide-75
SLIDE 75

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ▼❆❈✿ ❈❤❛s❦❡②

k 2k 2k M1 M2 Md T P P P k M1 M2 T P P P Md10∗ 4k 4k

  • ❇② ▼♦✉❤❛ ❡t ❛❧✳ ❬▼▼❱✰✶✹❪

❇❛s❡❞ ♦♥ ✇✐t❤ ✳ ✳ ❈❤❛s❦❡②

s❦

✳ ✳

s❦

✳ ✳

✷✽ ✴ ✺✷

slide-76
SLIDE 76

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ▼❆❈✿ ❈❤❛s❦❡②

k 2k 2k M1 M2 Md T P P P k M1 M2 T P P P Md10∗ 4k 4k

  • ❇② ▼♦✉❤❛ ❡t ❛❧✳ ❬▼▼❱✰✶✹❪
  • ❇❛s❡❞ ♦♥ XPX ✇✐t❤ T = {(1, 0, 1, 0), (3, 0, 2, 0), (5, 0, 4, 0)}

✳ ✳ ❈❤❛s❦❡②

s❦

✳ ✳

s❦

✳ ✳

✷✽ ✴ ✺✷

slide-77
SLIDE 77

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ❳P❳ t♦ ▼❆❈✿ ❈❤❛s❦❡②

k 2k 2k M1 M2 Md T P P P k M1 M2 T P P P Md10∗ 4k 4k

  • ❇② ▼♦✉❤❛ ❡t ❛❧✳ ❬▼▼❱✰✶✹❪
  • ❇❛s❡❞ ♦♥ XPX ✇✐t❤ T = {(1, 0, 1, 0), (3, 0, 2, 0), (5, 0, 4, 0)}

✳ ✳ ❈❤❛s❦❡②

O

  • σ2

2n

− − − →

s❦

✳ ✳ XPX

O

  • σ2

2n

− − − →

s❦

✳ ✳ P

✷✽ ✴ ✺✷

slide-78
SLIDE 78

❆♣♣❧✐❝❛t✐♦♥ t♦ ▼❆❈✿ ❆❞❥✉st❡❞ ❈❤❛s❦❡②

k 2k 2k M1 M2 Md T P P P P k M1 M2 T P P P P Md10∗ 4k 4k

  • ❊①tr❛ P✲❝❛❧❧
  • ❇❛s❡❞ ♦♥ XPX ✇✐t❤ T ′ = {(0, 1, 0, 1), (2, 1, 2, 0), (4, 1, 4, 0)}

✳ ✳ ❈❤❛s❦❡②

✲r❦

✳ ✳

✲r❦

✳ ✳ ❆♣♣r♦❛❝❤ ❛❧s♦ ❛♣♣❧✐❡s t♦ ❑❡②❡❞ ❙♣♦♥❣❡s

✷✾ ✴ ✺✷

slide-79
SLIDE 79

❆♣♣❧✐❝❛t✐♦♥ t♦ ▼❆❈✿ ❆❞❥✉st❡❞ ❈❤❛s❦❡②

k 2k 2k M1 M2 Md T P P P P k M1 M2 T P P P P Md10∗ 4k 4k

  • ❊①tr❛ P✲❝❛❧❧
  • ❇❛s❡❞ ♦♥ XPX ✇✐t❤ T ′ = {(0, 1, 0, 1), (2, 1, 2, 0), (4, 1, 4, 0)}

✳ ✳ ❈❤❛s❦❡②

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ XPX

O

  • σ2

2n

− − − →

Φ⊕✲r❦

✳ ✳ P ❆♣♣r♦❛❝❤ ❛❧s♦ ❛♣♣❧✐❡s t♦ ❑❡②❡❞ ❙♣♦♥❣❡s

✷✾ ✴ ✺✷

slide-80
SLIDE 80

❆♣♣❧✐❝❛t✐♦♥ t♦ ▼❆❈✿ ❆❞❥✉st❡❞ ❈❤❛s❦❡②

k 2k 2k M1 M2 Md T P P P P k M1 M2 T P P P P Md10∗ 4k 4k

  • ❊①tr❛ P✲❝❛❧❧
  • ❇❛s❡❞ ♦♥ XPX ✇✐t❤ T ′ = {(0, 1, 0, 1), (2, 1, 2, 0), (4, 1, 4, 0)}

✳ ✳ ❈❤❛s❦❡②

O

  • σ2

2n

− − − →

Φ✲r❦

✳ ✳ XPX

O

  • σ2

2n

− − − →

Φ⊕✲r❦

✳ ✳ P

  • ❆♣♣r♦❛❝❤ ❛❧s♦ ❛♣♣❧✐❡s t♦ ❑❡②❡❞ ❙♣♦♥❣❡s

✷✾ ✴ ✺✷

slide-81
SLIDE 81

❖✉t❧✐♥❡ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❙❡❝✉r✐t② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❊✣❝✐❡♥❝② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❈♦♥❝❧✉s✐♦♥

✸✵ ✴ ✺✷

slide-82
SLIDE 82

▼❊▼

  • MEM ❜② ●r❛♥❣❡r ❡t ❛❧✳ ❬●❏▼◆✶✺❪✿

m c ϕγ

2 ◦ ϕβ 1 ◦ ϕα 0 ◦ P(Nk)

P

  • ϕi ❛r❡ ✜①❡❞ ▲❋❙❘s✱ (α, β, γ, N) ✐s t✇❡❛❦ ✭s✐♠♣❧✐✜❡❞✮

▼❛s❦✐♥❣ ❝♦♠❜✐♥❡s ❛❞✈❛♥t❛❣❡s ♦❢✿

P♦✇❡r✐♥❣✲✉♣ ♠❛s❦✐♥❣ ▲❋❙❘ ♠❛s❦✐♥❣

◆❡✇ ♠❛s❦✐♥❣ ✐s s✐♠♣❧❡r✱ ❝♦♥st❛♥t✲t✐♠❡ ✭❜② ❞❡❢❛✉❧t✮✱ ♠♦r❡ ❡✣❝✐❡♥t

✸✶ ✴ ✺✷

slide-83
SLIDE 83

▼❊▼

  • MEM ❜② ●r❛♥❣❡r ❡t ❛❧✳ ❬●❏▼◆✶✺❪✿

m c ϕγ

2 ◦ ϕβ 1 ◦ ϕα 0 ◦ P(Nk)

P

  • ϕi ❛r❡ ✜①❡❞ ▲❋❙❘s✱ (α, β, γ, N) ✐s t✇❡❛❦ ✭s✐♠♣❧✐✜❡❞✮
  • ▼❛s❦✐♥❣ ❝♦♠❜✐♥❡s ❛❞✈❛♥t❛❣❡s ♦❢✿
  • P♦✇❡r✐♥❣✲✉♣ ♠❛s❦✐♥❣
  • ▲❋❙❘ ♠❛s❦✐♥❣

◆❡✇ ♠❛s❦✐♥❣ ✐s s✐♠♣❧❡r✱ ❝♦♥st❛♥t✲t✐♠❡ ✭❜② ❞❡❢❛✉❧t✮✱ ♠♦r❡ ❡✣❝✐❡♥t

✸✶ ✴ ✺✷

slide-84
SLIDE 84

▼❊▼

  • MEM ❜② ●r❛♥❣❡r ❡t ❛❧✳ ❬●❏▼◆✶✺❪✿

m c ϕγ

2 ◦ ϕβ 1 ◦ ϕα 0 ◦ P(Nk)

P

  • ϕi ❛r❡ ✜①❡❞ ▲❋❙❘s✱ (α, β, γ, N) ✐s t✇❡❛❦ ✭s✐♠♣❧✐✜❡❞✮
  • ▼❛s❦✐♥❣ ❝♦♠❜✐♥❡s ❛❞✈❛♥t❛❣❡s ♦❢✿
  • P♦✇❡r✐♥❣✲✉♣ ♠❛s❦✐♥❣
  • ▲❋❙❘ ♠❛s❦✐♥❣

◆❡✇ ♠❛s❦✐♥❣ ✐s s✐♠♣❧❡r✱ ❝♦♥st❛♥t✲t✐♠❡ ✭❜② ❞❡❢❛✉❧t✮✱ ♠♦r❡ ❡✣❝✐❡♥t

✸✶ ✴ ✺✷

slide-85
SLIDE 85

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ▼❊▼ t♦ ❆❊✿ ❖PP

A0 A1 Aa–1 M0 M1 Md–1 ⊕Mi C1 C2 Cd T

ϕ0(L) ϕ0(L) ϕ1(L) ϕ1(L) ϕa–1(L) ϕa–1(L) ϕ2

1◦ϕa–1(L)

ϕ2

1◦ϕa–1(L)

ϕ2◦ϕ0(L) ϕ2◦ϕ1(L) ϕ2◦ϕd–1(L) ϕ2◦ϕ0(L) ϕ2◦ϕ1(L) ϕ2◦ϕd–1(L)

P P P P P P P

  • ❖✛s❡t P✉❜❧✐❝ P❡r♠✉t❛t✐♦♥ ✭❖PP✮ ❬●❏▼◆✶✺❪
  • ●❡♥❡r❛❧✐③❛t✐♦♥ ♦❢ ❖❈❇✸✿
  • P❡r♠✉t❛t✐♦♥✲❜❛s❡❞
  • ▼♦r❡ ❡✣❝✐❡♥t ▼❊▼✲♠❛s❦✐♥❣
  • ❙❡❝✉r✐t② ❛❣❛✐♥st ♥♦♥❝❡✲r❡s♣❡❝t✐♥❣ ❛❞✈❡rs❛r✐❡s

✵✳✺✺ ❝♣❜ ✇✐t❤ r❡❞✉❝❡❞✲r♦✉♥❞ ❇▲❆❑❊✷❜

✸✷ ✴ ✺✷

L = P(Nk) ϕ1 = ϕ ⊕ id, ϕ2 = ϕ2 ⊕ ϕ ⊕ id

slide-86
SLIDE 86

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ▼❊▼ t♦ ❆❊✿ ❖PP

A0 A1 Aa–1 M0 M1 Md–1 ⊕Mi C1 C2 Cd T

ϕ0(L) ϕ0(L) ϕ1(L) ϕ1(L) ϕa–1(L) ϕa–1(L) ϕ2

1◦ϕa–1(L)

ϕ2

1◦ϕa–1(L)

ϕ2◦ϕ0(L) ϕ2◦ϕ1(L) ϕ2◦ϕd–1(L) ϕ2◦ϕ0(L) ϕ2◦ϕ1(L) ϕ2◦ϕd–1(L)

P P P P P P P

  • ❖✛s❡t P✉❜❧✐❝ P❡r♠✉t❛t✐♦♥ ✭❖PP✮ ❬●❏▼◆✶✺❪
  • ●❡♥❡r❛❧✐③❛t✐♦♥ ♦❢ ❖❈❇✸✿
  • P❡r♠✉t❛t✐♦♥✲❜❛s❡❞
  • ▼♦r❡ ❡✣❝✐❡♥t ▼❊▼✲♠❛s❦✐♥❣
  • ❙❡❝✉r✐t② ❛❣❛✐♥st ♥♦♥❝❡✲r❡s♣❡❝t✐♥❣ ❛❞✈❡rs❛r✐❡s

✵✳✺✺ ❝♣❜ ✇✐t❤ r❡❞✉❝❡❞✲r♦✉♥❞ ❇▲❆❑❊✷❜

✸✷ ✴ ✺✷

L = P(Nk) ϕ1 = ϕ ⊕ id, ϕ2 = ϕ2 ⊕ ϕ ⊕ id

slide-87
SLIDE 87

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ▼❊▼ t♦ ❆❊✿ ▼❘❖

A0 Aa–1 T0 Td–1 M0 Md–1

|A||M|

C1 Cd T

ϕ0(L) ϕ0(L) ϕa–1(L) ϕa–1(L) ϕ1◦ϕ0(L) ϕ1◦ϕ0(L) ϕ1◦ϕd–1(L) ϕ1◦ϕd–1(L) ϕ2

1(L)

ϕ2

1(L)

ϕ2(L) ϕ2(L) ϕ2(L)⊕M0 ϕ2(L)⊕Md–1

P P P P P P P

  • ▼✐s✉s❡✲❘❡s✐st❛♥t ❖PP ✭▼❘❖✮ ❬●❏▼◆✶✺❪
  • ❋✉❧❧② ♥♦♥❝❡✲♠✐s✉s❡ r❡s✐st❛♥t ✈❡rs✐♦♥ ♦❢ ❖PP

✶✳✵✻ ❝♣❜ ✇✐t❤ r❡❞✉❝❡❞✲r♦✉♥❞ ❇▲❆❑❊✷❜

✸✸ ✴ ✺✷

L = P(Nk) ϕ1 = ϕ ⊕ id, ϕ2 = ϕ2 ⊕ ϕ ⊕ id

slide-88
SLIDE 88

❆♣♣❧✐❝❛t✐♦♥ ♦❢ ▼❊▼ t♦ ❆❊✿ ▼❘❖

A0 Aa–1 T0 Td–1 M0 Md–1

|A||M|

C1 Cd T

ϕ0(L) ϕ0(L) ϕa–1(L) ϕa–1(L) ϕ1◦ϕ0(L) ϕ1◦ϕ0(L) ϕ1◦ϕd–1(L) ϕ1◦ϕd–1(L) ϕ2

1(L)

ϕ2

1(L)

ϕ2(L) ϕ2(L) ϕ2(L)⊕M0 ϕ2(L)⊕Md–1

P P P P P P P

  • ▼✐s✉s❡✲❘❡s✐st❛♥t ❖PP ✭▼❘❖✮ ❬●❏▼◆✶✺❪
  • ❋✉❧❧② ♥♦♥❝❡✲♠✐s✉s❡ r❡s✐st❛♥t ✈❡rs✐♦♥ ♦❢ ❖PP

✶✳✵✻ ❝♣❜ ✇✐t❤ r❡❞✉❝❡❞✲r♦✉♥❞ ❇▲❆❑❊✷❜

✸✸ ✴ ✺✷

L = P(Nk) ϕ1 = ϕ ⊕ id, ϕ2 = ϕ2 ⊕ ϕ ⊕ id

slide-89
SLIDE 89

❖✉t❧✐♥❡ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❙❡❝✉r✐t② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❊✣❝✐❡♥❝② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❈♦♥❝❧✉s✐♦♥

✸✹ ✴ ✺✷

slide-90
SLIDE 90

❙❡❝✉r✐t② ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞❄

  • ❆❧❧ r❡s✉❧ts s♦ ❢❛r✿ ✉♣ t♦ ❜✐rt❤❞❛② ❜♦✉♥❞

❙❡❝✉r✐t② ♦❢ ❆❊✬s ✐s ♠♦st❧② ❞♦♠✐♥❛t❡❞ ❜② s❡❝✉r✐t② ♦❢ ❋♦r s♦♠❡ ❆❊✬s ✭❡✳❣✳✱ ❖❈❇✱ ♣❖▼❉✱ ❖PP✱ ✳ ✳ ✳ ✮✿ ✳ ✳ ❆❊ ✳ ✳ ✳ ✳ ♦r

✸✺ ✴ ✺✷

❈❛♥ ✇❡ ✐♠♣r♦✈❡ t❤✐s❄

slide-91
SLIDE 91

❙❡❝✉r✐t② ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞❄

  • ❆❧❧ r❡s✉❧ts s♦ ❢❛r✿ ✉♣ t♦ ❜✐rt❤❞❛② ❜♦✉♥❞
  • ❙❡❝✉r✐t② ♦❢ ❆❊✬s ✐s ♠♦st❧② ❞♦♠✐♥❛t❡❞ ❜② s❡❝✉r✐t② ♦❢

E ❋♦r s♦♠❡ ❆❊✬s ✭❡✳❣✳✱ ❖❈❇✱ ♣❖▼❉✱ ❖PP✱ ✳ ✳ ✳ ✮✿ ✳ ✳ ❆❊ ✳ ✳ ✳ ✳ ♦r

✸✺ ✴ ✺✷

❈❛♥ ✇❡ ✐♠♣r♦✈❡ t❤✐s❄

slide-92
SLIDE 92

❙❡❝✉r✐t② ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞❄

  • ❆❧❧ r❡s✉❧ts s♦ ❢❛r✿ ✉♣ t♦ ❜✐rt❤❞❛② ❜♦✉♥❞
  • ❙❡❝✉r✐t② ♦❢ ❆❊✬s ✐s ♠♦st❧② ❞♦♠✐♥❛t❡❞ ❜② s❡❝✉r✐t② ♦❢

E

  • ❋♦r s♦♠❡ ❆❊✬s ✭❡✳❣✳✱ ❖❈❇✱ ♣❖▼❉✱ ❖PP✱ ✳ ✳ ✳ ✮✿

✳ ✳ ❆❊

O

  • σ

2n

− − − → ✳ ✳

  • E

O

  • σ2

2n

− − − → ✳ ✳ E ♦r P

✸✺ ✴ ✺✷

❈❛♥ ✇❡ ✐♠♣r♦✈❡ t❤✐s❄

slide-93
SLIDE 93

❙❡❝✉r✐t② ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞❄

  • ❆❧❧ r❡s✉❧ts s♦ ❢❛r✿ ✉♣ t♦ ❜✐rt❤❞❛② ❜♦✉♥❞
  • ❙❡❝✉r✐t② ♦❢ ❆❊✬s ✐s ♠♦st❧② ❞♦♠✐♥❛t❡❞ ❜② s❡❝✉r✐t② ♦❢

E

  • ❋♦r s♦♠❡ ❆❊✬s ✭❡✳❣✳✱ ❖❈❇✱ ♣❖▼❉✱ ❖PP✱ ✳ ✳ ✳ ✮✿

✳ ✳ ❆❊

O

  • σ

2n

− − − → ✳ ✳

  • E

O

  • σ2

2n

− − − → ✳ ✳ E ♦r P

✸✺ ✴ ✺✷

❈❛♥ ✇❡ ✐♠♣r♦✈❡ t❤✐s❄

− − →

slide-94
SLIDE 94

❇❇❇ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❇❧♦❝❦❝✐♣❤❡rs

m c

· · · · · ·

h1(t) h1(t)⊕h2(t) hρ−1(t)⊕hρ(t) hρ(t)

E E E

k1 k2 kρ

  • LRW2[ρ]✿ ❝♦♥❝❛t❡♥❛t✐♦♥ ♦❢ ρ LRW2✬s
  • k1, . . . , kρ ❛♥❞ h1, . . . , hρ ✐♥❞❡♣❡♥❞❡♥t

✿ s❡❝✉r❡ ✉♣ t♦ q✉❡r✐❡s ❬▲❙❚✶✷✱Pr♦✶✹❪ ❡✈❡♥✿ s❡❝✉r❡ ✉♣ t♦ q✉❡r✐❡s ❬▲❙✶✸❪ ❈♦♥❥❡❝t✉r❡✿ ♦♣t✐♠❛❧ s❡❝✉r✐t②

✸✻ ✴ ✺✷

slide-95
SLIDE 95

❇❇❇ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ ❇❧♦❝❦❝✐♣❤❡rs

m c

· · · · · ·

h1(t) h1(t)⊕h2(t) hρ−1(t)⊕hρ(t) hρ(t)

E E E

k1 k2 kρ

  • LRW2[ρ]✿ ❝♦♥❝❛t❡♥❛t✐♦♥ ♦❢ ρ LRW2✬s
  • k1, . . . , kρ ❛♥❞ h1, . . . , hρ ✐♥❞❡♣❡♥❞❡♥t
  • ρ = 2✿ s❡❝✉r❡ ✉♣ t♦ 22n/3 q✉❡r✐❡s ❬▲❙❚✶✷✱Pr♦✶✹❪
  • ρ ≥ 2 ❡✈❡♥✿ s❡❝✉r❡ ✉♣ t♦ 2ρn/(ρ+2) q✉❡r✐❡s ❬▲❙✶✸❪
  • ❈♦♥❥❡❝t✉r❡✿ ♦♣t✐♠❛❧ 2ρn/(ρ+1) s❡❝✉r✐t②

✸✻ ✴ ✺✷

slide-96
SLIDE 96

❇❇❇ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ P❡r♠✉t❛t✐♦♥s

m c

· · · · · ·

h1(t) h1(t)⊕h2(t) hρ−1(t)⊕hρ(t) hρ(t)

P1 P2 Pρ

  • TEM[ρ]✿ ❝♦♥❝❛t❡♥❛t✐♦♥ ♦❢ ρ TEM✲❧✐❦❡✬s
  • P1, . . . , Pρ ❛♥❞ h1, . . . , hρ ✐♥❞❡♣❡♥❞❡♥t

✿ s❡❝✉r❡ ✉♣ t♦ q✉❡r✐❡s ❬❈▲❙✶✺❪ ❡✈❡♥✿ s❡❝✉r❡ ✉♣ t♦ q✉❡r✐❡s ❬❈▲❙✶✺❪ ❈♦♥❥❡❝t✉r❡✿ ♦♣t✐♠❛❧ s❡❝✉r✐t②

✸✼ ✴ ✺✷

slide-97
SLIDE 97

❇❇❇ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❢r♦♠ P❡r♠✉t❛t✐♦♥s

m c

· · · · · ·

h1(t) h1(t)⊕h2(t) hρ−1(t)⊕hρ(t) hρ(t)

P1 P2 Pρ

  • TEM[ρ]✿ ❝♦♥❝❛t❡♥❛t✐♦♥ ♦❢ ρ TEM✲❧✐❦❡✬s
  • P1, . . . , Pρ ❛♥❞ h1, . . . , hρ ✐♥❞❡♣❡♥❞❡♥t
  • ρ = 2✿ s❡❝✉r❡ ✉♣ t♦ 22n/3 q✉❡r✐❡s ❬❈▲❙✶✺❪
  • ρ ≥ 2 ❡✈❡♥✿ s❡❝✉r❡ ✉♣ t♦ 2ρn/(ρ+2) q✉❡r✐❡s ❬❈▲❙✶✺❪
  • ❈♦♥❥❡❝t✉r❡✿ ♦♣t✐♠❛❧ 2ρn/(ρ+1) s❡❝✉r✐t②

✸✼ ✴ ✺✷

slide-98
SLIDE 98

❙t❛t❡ ♦❢ t❤❡ ❆rt ✭❇❧♦❝❦❝✐♣❤❡r ❇❛s❡❞✮

s❝❤❡♠❡ s❡❝✉r✐t② ✭log2✮ ❦❡② ❧❡♥❣t❤ ❝♦st E ⊗/h LRW1 n/2 n ✷ ✵ LRW2 n/2 2n ✶ ✶ XEX n/2 n ✷ ✵ LRW2[2] 2n/3 4n ✷ ✷ LRW2[ρ] ρn/(ρ+2) 2ρn ρ ρ max{n/2, n−|t|}

❖♣t✐♠❛❧ 2n s❡❝✉r✐t② ♦♥❧② ✐❢ ❦❡② ❧❡♥❣t❤ ❛♥❞ ❝♦st → ∞❄

✸✽ ✴ ✺✷

slide-99
SLIDE 99

❚✇❡❛❦✲❉❡♣❡♥❞❡♥t ❑❡②s

✳ ✳ ❊✣❝✐❡♥❝② t✇❡❛❦ s❝❤❡❞✉❧❡ ❧✐❣❤t❡r t❤❛♥ ❦❡② s❝❤❡❞✉❧❡ ✳ ✳ ❙❡❝✉r✐t② t✇❡❛❦ s❝❤❡❞✉❧❡ str♦♥❣❡r t❤❛♥ ❦❡② s❝❤❡❞✉❧❡

❚✇❡❛❦ ❛♥❞ ❦❡② ❝❤❛♥❣❡ ❛♣♣r♦①✐♠❛t❡❧② ❡q✉❛❧❧② ❡①♣❡♥s✐✈❡

❚❲❊❆❑❊❨ ❬❏◆P✶✹❪ ❦❡② s❝❤❡❞✉❧✐♥❣ ❜❧❡♥❞s ❦❡② ❛♥❞ t✇❡❛❦

✸✾ ✴ ✺✷

slide-100
SLIDE 100

❚✇❡❛❦✲❉❡♣❡♥❞❡♥t ❑❡②s

✳ ✳ ❊✣❝✐❡♥❝② t✇❡❛❦ s❝❤❡❞✉❧❡ ❧✐❣❤t❡r t❤❛♥ ❦❡② s❝❤❡❞✉❧❡ ✳ ✳ ❙❡❝✉r✐t② t✇❡❛❦ s❝❤❡❞✉❧❡ str♦♥❣❡r t❤❛♥ ❦❡② s❝❤❡❞✉❧❡

❚✇❡❛❦ ❛♥❞ ❦❡② ❝❤❛♥❣❡ ❛♣♣r♦①✐♠❛t❡❧② ❡q✉❛❧❧② ❡①♣❡♥s✐✈❡

❚❲❊❆❑❊❨ ❬❏◆P✶✹❪ ❦❡② s❝❤❡❞✉❧✐♥❣ ❜❧❡♥❞s ❦❡② ❛♥❞ t✇❡❛❦

✸✾ ✴ ✺✷

slide-101
SLIDE 101

❚✇❡❛❦✲❉❡♣❡♥❞❡♥t ❑❡②s

✳ ✳ ❊✣❝✐❡♥❝② t✇❡❛❦ s❝❤❡❞✉❧❡ ❧✐❣❤t❡r t❤❛♥ ❦❡② s❝❤❡❞✉❧❡ ✳ ✳ ❙❡❝✉r✐t② t✇❡❛❦ s❝❤❡❞✉❧❡ str♦♥❣❡r t❤❛♥ ❦❡② s❝❤❡❞✉❧❡

❚✇❡❛❦ ❛♥❞ ❦❡② ❝❤❛♥❣❡ ❛♣♣r♦①✐♠❛t❡❧② ❡q✉❛❧❧② ❡①♣❡♥s✐✈❡

❚❲❊❆❑❊❨ ❬❏◆P✶✹❪ ❦❡② s❝❤❡❞✉❧✐♥❣ ❜❧❡♥❞s ❦❡② ❛♥❞ t✇❡❛❦

✸✾ ✴ ✺✷

                                              

slide-102
SLIDE 102

❚✇❡❛❦✲❉❡♣❡♥❞❡♥t ❑❡②s

✳ ✳ ❊✣❝✐❡♥❝② t✇❡❛❦ s❝❤❡❞✉❧❡ ❧✐❣❤t❡r t❤❛♥ ❦❡② s❝❤❡❞✉❧❡ ✳ ✳ ❙❡❝✉r✐t② t✇❡❛❦ s❝❤❡❞✉❧❡ str♦♥❣❡r t❤❛♥ ❦❡② s❝❤❡❞✉❧❡

❚✇❡❛❦ ❛♥❞ ❦❡② ❝❤❛♥❣❡ ❛♣♣r♦①✐♠❛t❡❧② ❡q✉❛❧❧② ❡①♣❡♥s✐✈❡

  • ❚❲❊❆❑❊❨ ❬❏◆P✶✹❪ ❦❡② s❝❤❡❞✉❧✐♥❣ ❜❧❡♥❞s ❦❡② ❛♥❞ t✇❡❛❦

✸✾ ✴ ✺✷

                                              

slide-103
SLIDE 103

❚✇❡❛❦✲❉❡♣❡♥❞❡♥t ❑❡②s

  • ▼✐♥❡♠❛ts✉ ❬▼✐♥✵✾❪✿

m c

E E

k t0n−|t|

  • ❙❡❝✉r❡ ✉♣ t♦ max{2n/2, 2n−|t|} q✉❡r✐❡s
  • ❇❡②♦♥❞ ❜✐rt❤❞❛② ❜♦✉♥❞ ❢♦r |t| < n/2

❚✇❡❛❦✲❧❡♥❣t❤ ❡①t❡♥s✐♦♥ ♣♦ss✐❜❧❡ ❜② ❳❚❳ ❬▼■✶✺❪

✹✵ ✴ ✺✷

slide-104
SLIDE 104

❚✇❡❛❦✲❉❡♣❡♥❞❡♥t ❑❡②s

  • ▼✐♥❡♠❛ts✉ ❬▼✐♥✵✾❪✿

m c

E E

k t2 t2 t10n−|t1|

h

t t1t2

  • ❙❡❝✉r❡ ✉♣ t♦ max{2n/2, 2n−|t|} q✉❡r✐❡s
  • ❇❡②♦♥❞ ❜✐rt❤❞❛② ❜♦✉♥❞ ❢♦r |t| < n/2
  • ❚✇❡❛❦✲❧❡♥❣t❤ ❡①t❡♥s✐♦♥ ♣♦ss✐❜❧❡ ❜② ❳❚❳ ❬▼■✶✺❪

✹✵ ✴ ✺✷

slide-105
SLIDE 105

❙t❛t❡ ♦❢ t❤❡ ❆rt ✭❇❧♦❝❦❝✐♣❤❡r ❇❛s❡❞✮

s❝❤❡♠❡ s❡❝✉r✐t② ✭log2✮ ❦❡② ❧❡♥❣t❤ ❝♦st E ⊗/h t❞❦ LRW1 n/2 n ✷ ✵ ✵ LRW2 n/2 2n ✶ ✶ ✵ XEX n/2 n ✷ ✵ ✵ LRW2[2] 2n/3 4n ✷ ✷ ✵ LRW2[ρ] ρn/(ρ+2) 2ρn ρ ρ ✵ Min max{n/2, n−|t|} n ✷ ✵ ✶ Min✲❳❚❳ 2n/3 7n/3 ✷ ✶ ✶

✹✶ ✴ ✺✷

slide-106
SLIDE 106
  • ♦❛❧
  • ✐✈❡♥ ❛ ❜❧♦❝❦❝✐♣❤❡r E✱

❝♦♥str✉❝t ♦♣t✐♠❛❧❧② s❡❝✉r❡ t✇❡❛❦❛❜❧❡ ❜❧♦❝❦❝✐♣❤❡r E m t c

E

  • E

k

✹✷ ✴ ✺✷

  • ❛❧❧ ✇✐r❡s

❝❛rr② n ❜✐ts

slide-107
SLIDE 107
  • ❡♥❡r✐❝ ❉❡s✐❣♥

m m m m c

E E E A1 A2 A3 A4 B1 B2 B3

k, t k, t k, t, y1 k, t, y1, y2 l1 x1 y1 l2 x2 y2 l3 x3 y3

  • E[ρ] ✭❢♦r ρ ≥ 1✮

▼✐①✐♥❣ ❢✉♥❝t✐♦♥s

s❤♦✉❧❞ ❜❡ s✉❝❤ t❤❛t ✐s ✐♥✈❡rt✐❜❧❡ ❜✉t ❝❛♥ ❜❡ ❛♥②t❤✐♥❣ ♦t❤❡r✇✐s❡

✹✸ ✴ ✺✷

slide-108
SLIDE 108
  • ❡♥❡r✐❝ ❉❡s✐❣♥

m m m m c

E E E A1 A2 A3 A4 B1 B2 B3

k, t k, t k, t, y1 k, t, y1, y2 l1 x1 y1 l2 x2 y2 l3 x3 y3

  • E[ρ] ✭❢♦r ρ ≥ 1✮
  • ▼✐①✐♥❣ ❢✉♥❝t✐♦♥s Ai, Bi
  • s❤♦✉❧❞ ❜❡ s✉❝❤ t❤❛t

E[ρ] ✐s ✐♥✈❡rt✐❜❧❡

  • ❜✉t ❝❛♥ ❜❡ ❛♥②t❤✐♥❣ ♦t❤❡r✇✐s❡

✹✸ ✴ ✺✷

slide-109
SLIDE 109

❖♥❡ E✲❈❛❧❧ ✇✐t❤ ▲✐♥❡❛r ▼✐①✐♥❣

m m c

E A1 A2 B1

k, t l1 x1 y1

❚❤❡♦r❡♠ ❬▼❡♥✶✺❛❪ ■❢ ❛r❡ ❧✐♥❡❛r✱ ❝❛♥ ❜❡ ❛tt❛❝❦❡❞ ✐♥ ❛t ♠♦st ❛❜♦✉t q✉❡r✐❡s

✹✹ ✴ ✺✷

slide-110
SLIDE 110

❖♥❡ E✲❈❛❧❧ ✇✐t❤ ▲✐♥❡❛r ▼✐①✐♥❣

m m c

E A1 A2 B1

k, t l1 x1 y1

❚❤❡♦r❡♠ ❬▼❡♥✶✺❛❪

  • ■❢ A1, B1, A2 ❛r❡ ❧✐♥❡❛r✱

E[1] ❝❛♥ ❜❡ ❛tt❛❝❦❡❞ ✐♥ ❛t ♠♦st ❛❜♦✉t 2n/2 q✉❡r✐❡s

✹✹ ✴ ✺✷

slide-111
SLIDE 111

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣

m c k t z

E

Men1(k, t, m) = c ❬▼❡♥✶✺❛❪

■❞❡❛

  • ❙✉❜❦❡② k ⊕ t
  • ▼❛s❦✐♥❣ k ⊗ t

❙❡❝✉r✐t② ❯♣ t♦ q✉❡r✐❡s ❈♦st ❖♥❡ ✲❝❛❧❧ ❖♥❡ ✲❡✈❛❧✉❛t✐♦♥ ❖♥❡ r❡✲❦❡②

✹✺ ✴ ✺✷

slide-112
SLIDE 112

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣

m c k t z

E

Men1(k, t, m) = c ❬▼❡♥✶✺❛❪

■❞❡❛

  • ❙✉❜❦❡② k ⊕ t
  • ▼❛s❦✐♥❣ k ⊗ t

❙❡❝✉r✐t②

  • ❯♣ t♦ 22n/3 q✉❡r✐❡s

❈♦st ❖♥❡ ✲❝❛❧❧ ❖♥❡ ✲❡✈❛❧✉❛t✐♦♥ ❖♥❡ r❡✲❦❡②

✹✺ ✴ ✺✷

slide-113
SLIDE 113

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣

m c k t z

E

Men1(k, t, m) = c ❬▼❡♥✶✺❛❪

■❞❡❛

  • ❙✉❜❦❡② k ⊕ t
  • ▼❛s❦✐♥❣ k ⊗ t

❙❡❝✉r✐t②

  • ❯♣ t♦ 22n/3 q✉❡r✐❡s

❈♦st

  • ❖♥❡ E✲❝❛❧❧
  • ❖♥❡ ⊗✲❡✈❛❧✉❛t✐♦♥
  • ❖♥❡ r❡✲❦❡②

✹✺ ✴ ✺✷

slide-114
SLIDE 114

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

E

  • ❑❡② k ✐s s❡❝r❡t

❈♦♥s✐❞❡r ❛♥② ❝♦♥str✉❝t✐♦♥ q✉❡r② ▼❛② ✏❤✐t✑ ❛♥② ♣r✐♠✐t✐✈❡ q✉❡r② ❛♥❞ ❛♥❞ ♦r ♦r ❛♥❞ ❛♥❞

✹✻ ✴ ✺✷

slide-115
SLIDE 115

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

E

m c t

  • ❑❡② k ✐s s❡❝r❡t
  • ❈♦♥s✐❞❡r ❛♥② ❝♦♥str✉❝t✐♦♥ q✉❡r② (t, m, c)

▼❛② ✏❤✐t✑ ❛♥② ♣r✐♠✐t✐✈❡ q✉❡r② ❛♥❞ ❛♥❞ ♦r ♦r ❛♥❞ ❛♥❞

✹✻ ✴ ✺✷

slide-116
SLIDE 116

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

E

m c t m ⊕ k ⊗ t c ⊕ k ⊗ t k ⊕ t

  • ❑❡② k ✐s s❡❝r❡t
  • ❈♦♥s✐❞❡r ❛♥② ❝♦♥str✉❝t✐♦♥ q✉❡r② (t, m, c)

▼❛② ✏❤✐t✑ ❛♥② ♣r✐♠✐t✐✈❡ q✉❡r② ❛♥❞ ❛♥❞ ♦r ♦r ❛♥❞ ❛♥❞

✹✻ ✴ ✺✷

slide-117
SLIDE 117

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

E

m c t m ⊕ k ⊗ t c ⊕ k ⊗ t k ⊕ t x y l

  • ❑❡② k ✐s s❡❝r❡t
  • ❈♦♥s✐❞❡r ❛♥② ❝♦♥str✉❝t✐♦♥ q✉❡r② (t, m, c)
  • ▼❛② ✏❤✐t✑ ❛♥② ♣r✐♠✐t✐✈❡ q✉❡r② (l, x, y)

❛♥❞ ❛♥❞ ♦r ♦r ❛♥❞ ❛♥❞

✹✻ ✴ ✺✷

slide-118
SLIDE 118

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

E

m c t m ⊕ k ⊗ t c ⊕ k ⊗ t k ⊕ t x y l

  • ❑❡② k ✐s s❡❝r❡t
  • ❈♦♥s✐❞❡r ❛♥② ❝♦♥str✉❝t✐♦♥ q✉❡r② (t, m, c)
  • ▼❛② ✏❤✐t✑ ❛♥② ♣r✐♠✐t✐✈❡ q✉❡r② (l, x, y)

k ⊕ t = l ❛♥❞ m ⊕ k ⊗ t = x ❛♥❞ ♦r ♦r ❛♥❞ ❛♥❞

✹✻ ✴ ✺✷

slide-119
SLIDE 119

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

E

m c t m ⊕ k ⊗ t c ⊕ k ⊗ t k ⊕ t x y l

  • ❑❡② k ✐s s❡❝r❡t
  • ❈♦♥s✐❞❡r ❛♥② ❝♦♥str✉❝t✐♦♥ q✉❡r② (t, m, c)
  • ▼❛② ✏❤✐t✑ ❛♥② ♣r✐♠✐t✐✈❡ q✉❡r② (l, x, y)

k ⊕ t = l ❛♥❞ m ⊕ k ⊗ t = x ❛♥❞ ♦r ♦r k ⊕ t = l ❛♥❞ c ⊕ k ⊗ t = y ❛♥❞

✹✻ ✴ ✺✷

slide-120
SLIDE 120

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

E

m c t m ⊕ k ⊗ t c ⊕ k ⊗ t k ⊕ t x y l

  • ❑❡② k ✐s s❡❝r❡t
  • ❈♦♥s✐❞❡r ❛♥② ❝♦♥str✉❝t✐♦♥ q✉❡r② (t, m, c)
  • ▼❛② ✏❤✐t✑ ❛♥② ♣r✐♠✐t✐✈❡ q✉❡r② (l, x, y)

k ⊕ t = l ❛♥❞ m ⊕ k ⊗ t = x ⇐ ⇒ k = l ⊕ t ❛♥❞ m ⊕ (l ⊕ t) ⊗ t = x ♦r ♦r k ⊕ t = l ❛♥❞ c ⊕ k ⊗ t = y ⇐ ⇒ k = l ⊕ t ❛♥❞ c ⊕ (l ⊕ t) ⊗ t = y

✹✻ ✴ ✺✷

slide-121
SLIDE 121

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

E

m c t m ⊕ k ⊗ t c ⊕ k ⊗ t k ⊕ t x y l

  • ❑❡② k ✐s s❡❝r❡t
  • ❈♦♥s✐❞❡r ❛♥② ❝♦♥str✉❝t✐♦♥ q✉❡r② (t, m, c)
  • ▼❛② ✏❤✐t✑ ❛♥② ♣r✐♠✐t✐✈❡ q✉❡r② (l, x, y)

k ⊕ t = l ❛♥❞ m ⊕ k ⊗ t = x ⇐ ⇒ k = l ⊕ t ❛♥❞ m ⊕ (l ⊕ t) ⊗ t = x ♦r ♦r k ⊕ t = l ❛♥❞ c ⊕ k ⊗ t = y ⇐ ⇒ k = l ⊕ t ❛♥❞ c ⊕ (l ⊕ t) ⊗ t = y

✹✻ ✴ ✺✷

slide-122
SLIDE 122

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k = l ⊕ t ❛♥❞ m ⊕ (l ⊕ t) ⊗ t = x

❙③❡♠❡ré❞✐✲❚r♦tt❡r t❤❡♦r❡♠ ❬❙❚✽✸❪

❈♦♥s✐❞❡r ❛ ✜♥✐t❡ ✜❡❧❞ ✳ ▲❡t ❜❡ ❛ s❡t ♦❢ ❧✐♥❡s ❜❡ ❛ s❡t ♦❢ ♣♦✐♥ts ★ ♣♦✐♥t✲❧✐♥❡ ✐♥❝✐❞❡♥❝❡s

❈♦♥str✉❝t✐♦♥ q✉❡r✐❡s ❂ ❧✐♥❡s Pr✐♠✐t✐✈❡ q✉❡r✐❡s ❂ ♣♦✐♥ts ❆❜♦✉t s♦❧✉t✐♦♥s t♦ ❊✈❡r② s♦❧✉t✐♦♥ ✜①❡s ♦♥❡ ✐s r❛♥❞♦♠ ✲❜✐t ❦❡②

✹✼ ✴ ✺✷

slide-123
SLIDE 123

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k = l ⊕ t ❛♥❞ m ⊕ (l ⊕ t) ⊗ t = x

❙③❡♠❡ré❞✐✲❚r♦tt❡r t❤❡♦r❡♠ ❬❙❚✽✸❪

❈♦♥s✐❞❡r ❛ ✜♥✐t❡ ✜❡❧❞ F✳ ▲❡t

  • L ⊆ F2 ❜❡ ❛ s❡t ♦❢ ❧✐♥❡s
  • P ⊆ F2 ❜❡ ❛ s❡t ♦❢ ♣♦✐♥ts

★ ♣♦✐♥t✲❧✐♥❡ ✐♥❝✐❞❡♥❝❡s ≤ min{|L|1/2|P|+|L|, |L||P|1/2 +|P|}

❈♦♥str✉❝t✐♦♥ q✉❡r✐❡s ❂ ❧✐♥❡s Pr✐♠✐t✐✈❡ q✉❡r✐❡s ❂ ♣♦✐♥ts ❆❜♦✉t s♦❧✉t✐♦♥s t♦ ❊✈❡r② s♦❧✉t✐♦♥ ✜①❡s ♦♥❡ ✐s r❛♥❞♦♠ ✲❜✐t ❦❡②

✹✼ ✴ ✺✷

slide-124
SLIDE 124

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k = l ⊕ t ❛♥❞ m ⊕ (l ⊕ t) ⊗ t = x

❙③❡♠❡ré❞✐✲❚r♦tt❡r t❤❡♦r❡♠ ❬❙❚✽✸❪

❈♦♥s✐❞❡r ❛ ✜♥✐t❡ ✜❡❧❞ F✳ ▲❡t

  • L ⊆ F2 ❜❡ ❛ s❡t ♦❢ ❧✐♥❡s
  • P ⊆ F2 ❜❡ ❛ s❡t ♦❢ ♣♦✐♥ts

★ ♣♦✐♥t✲❧✐♥❡ ✐♥❝✐❞❡♥❝❡s ≤ min{|L|1/2|P|+|L|, |L||P|1/2 +|P|}

  • ❈♦♥str✉❝t✐♦♥ q✉❡r✐❡s ❂ ❧✐♥❡s
  • Pr✐♠✐t✐✈❡ q✉❡r✐❡s ❂ ♣♦✐♥ts

❆❜♦✉t s♦❧✉t✐♦♥s t♦ ❊✈❡r② s♦❧✉t✐♦♥ ✜①❡s ♦♥❡ ✐s r❛♥❞♦♠ ✲❜✐t ❦❡②

✹✼ ✴ ✺✷

slide-125
SLIDE 125

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k = l ⊕ t ❛♥❞ m ⊕ (l ⊕ t) ⊗ t = x

❙③❡♠❡ré❞✐✲❚r♦tt❡r t❤❡♦r❡♠ ❬❙❚✽✸❪

❈♦♥s✐❞❡r ❛ ✜♥✐t❡ ✜❡❧❞ F✳ ▲❡t

  • L ⊆ F2 ❜❡ ❛ s❡t ♦❢ ❧✐♥❡s
  • P ⊆ F2 ❜❡ ❛ s❡t ♦❢ ♣♦✐♥ts

★ ♣♦✐♥t✲❧✐♥❡ ✐♥❝✐❞❡♥❝❡s ≤ min{|L|1/2|P|+|L|, |L||P|1/2 +|P|}

  • ❈♦♥str✉❝t✐♦♥ q✉❡r✐❡s ❂ ❧✐♥❡s
  • Pr✐♠✐t✐✈❡ q✉❡r✐❡s ❂ ♣♦✐♥ts
  • ❆❜♦✉t q3/2 s♦❧✉t✐♦♥s t♦ m ⊕ (l ⊕ t) ⊗ t = x

❊✈❡r② s♦❧✉t✐♦♥ ✜①❡s ♦♥❡ ✐s r❛♥❞♦♠ ✲❜✐t ❦❡②

✹✼ ✴ ✺✷

slide-126
SLIDE 126

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k = l ⊕ t ❛♥❞ m ⊕ (l ⊕ t) ⊗ t = x

❙③❡♠❡ré❞✐✲❚r♦tt❡r t❤❡♦r❡♠ ❬❙❚✽✸❪

❈♦♥s✐❞❡r ❛ ✜♥✐t❡ ✜❡❧❞ F✳ ▲❡t

  • L ⊆ F2 ❜❡ ❛ s❡t ♦❢ ❧✐♥❡s
  • P ⊆ F2 ❜❡ ❛ s❡t ♦❢ ♣♦✐♥ts

★ ♣♦✐♥t✲❧✐♥❡ ✐♥❝✐❞❡♥❝❡s ≤ min{|L|1/2|P|+|L|, |L||P|1/2 +|P|}

  • ❈♦♥str✉❝t✐♦♥ q✉❡r✐❡s ❂ ❧✐♥❡s
  • Pr✐♠✐t✐✈❡ q✉❡r✐❡s ❂ ♣♦✐♥ts
  • ❆❜♦✉t q3/2 s♦❧✉t✐♦♥s t♦ m ⊕ (l ⊕ t) ⊗ t = x
  • ❊✈❡r② s♦❧✉t✐♦♥ ✜①❡s ♦♥❡ l ⊕ t

✐s r❛♥❞♦♠ ✲❜✐t ❦❡②

✹✼ ✴ ✺✷

slide-127
SLIDE 127

❖♥❡ E✲❈❛❧❧ ✇✐t❤ P♦❧②♥♦♠✐❛❧ ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k = l ⊕ t ❛♥❞ m ⊕ (l ⊕ t) ⊗ t = x

❙③❡♠❡ré❞✐✲❚r♦tt❡r t❤❡♦r❡♠ ❬❙❚✽✸❪

❈♦♥s✐❞❡r ❛ ✜♥✐t❡ ✜❡❧❞ F✳ ▲❡t

  • L ⊆ F2 ❜❡ ❛ s❡t ♦❢ ❧✐♥❡s
  • P ⊆ F2 ❜❡ ❛ s❡t ♦❢ ♣♦✐♥ts

★ ♣♦✐♥t✲❧✐♥❡ ✐♥❝✐❞❡♥❝❡s ≤ min{|L|1/2|P|+|L|, |L||P|1/2 +|P|}

  • ❈♦♥str✉❝t✐♦♥ q✉❡r✐❡s ❂ ❧✐♥❡s
  • Pr✐♠✐t✐✈❡ q✉❡r✐❡s ❂ ♣♦✐♥ts
  • ❆❜♦✉t q3/2 s♦❧✉t✐♦♥s t♦ m ⊕ (l ⊕ t) ⊗ t = x
  • ❊✈❡r② s♦❧✉t✐♦♥ ✜①❡s ♦♥❡ l ⊕ t
  • k ✐s r❛♥❞♦♠ n✲❜✐t ❦❡②

✹✼ ✴ ✺✷

slide-128
SLIDE 128

❚✇♦ E✲❈❛❧❧s ✇✐t❤ ▲✐♥❡❛r ▼✐①✐♥❣

m c k

2

t z

E E

Men2(k, t, m) = c

■❞❡❛

  • ❙✉❜❦❡② k ⊕ t
  • ▼❛s❦✐♥❣ E(2k, t)

❙❡❝✉r✐t② ❯♣ t♦ q✉❡r✐❡s ❈♦st ❚✇♦ ✲❝❛❧❧s ❩❡r♦ ✲❡✈❛❧✉❛t✐♦♥s ❖♥❡ r❡✲❦❡②

✹✽ ✴ ✺✷

◆❡✇ ❛❢t❡r ♦❜s❡r✈❛t✐♦♥ ❜② ●✉♦ ❡t ❛❧✳ ✭♦r✐❣✐♥❛❧ ♣r♦♦❢ ♦♥❧② ❢♦r ✮

slide-129
SLIDE 129

❚✇♦ E✲❈❛❧❧s ✇✐t❤ ▲✐♥❡❛r ▼✐①✐♥❣

m c k

2

t z

E E

Men2(k, t, m) = c

■❞❡❛

  • ❙✉❜❦❡② k ⊕ t
  • ▼❛s❦✐♥❣ E(2k, t)

❙❡❝✉r✐t②

  • ❯♣ t♦ 2n q✉❡r✐❡s

❈♦st ❚✇♦ ✲❝❛❧❧s ❩❡r♦ ✲❡✈❛❧✉❛t✐♦♥s ❖♥❡ r❡✲❦❡②

✹✽ ✴ ✺✷

◆❡✇ ❛❢t❡r ♦❜s❡r✈❛t✐♦♥ ❜② ●✉♦ ❡t ❛❧✳ ✭♦r✐❣✐♥❛❧ ♣r♦♦❢ ♦♥❧② ❢♦r ✮

slide-130
SLIDE 130

❚✇♦ E✲❈❛❧❧s ✇✐t❤ ▲✐♥❡❛r ▼✐①✐♥❣

m c k

2

t z

E E

Men2(k, t, m) = c

■❞❡❛

  • ❙✉❜❦❡② k ⊕ t
  • ▼❛s❦✐♥❣ E(2k, t)

❙❡❝✉r✐t②

  • ❯♣ t♦ 2n q✉❡r✐❡s

❈♦st

  • ❚✇♦ E✲❝❛❧❧s
  • ❩❡r♦ ⊗✲❡✈❛❧✉❛t✐♦♥s
  • ❖♥❡ r❡✲❦❡②

✹✽ ✴ ✺✷

◆❡✇ ❛❢t❡r ♦❜s❡r✈❛t✐♦♥ ❜② ●✉♦ ❡t ❛❧✳ ✭♦r✐❣✐♥❛❧ ♣r♦♦❢ ♦♥❧② ❢♦r ✮

slide-131
SLIDE 131

❚✇♦ E✲❈❛❧❧s ✇✐t❤ ▲✐♥❡❛r ▼✐①✐♥❣

m c k

2

t z

E E

Men2(k, t, m) = c

■❞❡❛

  • ❙✉❜❦❡② k ⊕ t
  • ▼❛s❦✐♥❣ E(2k, t)

❙❡❝✉r✐t②

  • ❯♣ t♦ 2n q✉❡r✐❡s

❈♦st

  • ❚✇♦ E✲❝❛❧❧s
  • ❩❡r♦ ⊗✲❡✈❛❧✉❛t✐♦♥s
  • ❖♥❡ r❡✲❦❡②

✹✽ ✴ ✺✷

← − − − − − − − − −

◆❡✇ ❛❢t❡r ♦❜s❡r✈❛t✐♦♥ ❜② ●✉♦ ❡t ❛❧✳ ✭♦r✐❣✐♥❛❧ ♣r♦♦❢ ♦♥❧② ❢♦r t = 0✮

slide-132
SLIDE 132

❚✇♦ E✲❈❛❧❧s ✇✐t❤ ▲✐♥❡❛r ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

2

E E

❈♦♥str✉❝t✐♦♥ q✉❡r② ✏❤✐ts✑ ♣r✐♠✐t✐✈❡ q✉❡r② ✐❢ ❛♥❞ ♦r ❛♥❞ ✐s r❛♥❞♦♠ ❦❡②✱ ✐s ❛❧♠♦st✲r❛♥❞♦♠ s✉❜❦❡②

✹✾ ✴ ✺✷

slide-133
SLIDE 133

❚✇♦ E✲❈❛❧❧s ✇✐t❤ ▲✐♥❡❛r ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

2

E E

z m c t z ⊕ m z ⊕ c k ⊕ t x y l

  • ❈♦♥str✉❝t✐♦♥ q✉❡r② (t, m, c) ✏❤✐ts✑ ♣r✐♠✐t✐✈❡ q✉❡r② (l, x, y) ✐❢

k ⊕ t = l ❛♥❞ z ⊕ m = x ♦r k ⊕ t = l ❛♥❞ z ⊕ c = y ✐s r❛♥❞♦♠ ❦❡②✱ ✐s ❛❧♠♦st✲r❛♥❞♦♠ s✉❜❦❡②

✹✾ ✴ ✺✷

slide-134
SLIDE 134

❚✇♦ E✲❈❛❧❧s ✇✐t❤ ▲✐♥❡❛r ▼✐①✐♥❣✿ Pr♦♦❢ ■❞❡❛

k

2

E E

z m c t z ⊕ m z ⊕ c k ⊕ t x y l

  • ❈♦♥str✉❝t✐♦♥ q✉❡r② (t, m, c) ✏❤✐ts✑ ♣r✐♠✐t✐✈❡ q✉❡r② (l, x, y) ✐❢

k ⊕ t = l ❛♥❞ z ⊕ m = x ♦r k ⊕ t = l ❛♥❞ z ⊕ c = y

  • k ✐s r❛♥❞♦♠ ❦❡②✱ z ✐s ❛❧♠♦st✲r❛♥❞♦♠ s✉❜❦❡②

✹✾ ✴ ✺✷

slide-135
SLIDE 135

❈♦♠♣❛r✐s♦♥

s❝❤❡♠❡ s❡❝✉r✐t② ✭log2✮ ❦❡② ❧❡♥❣t❤ ❝♦st E ⊗/h t❞❦ LRW1 n/2 n ✷ ✵ ✵ LRW2 n/2 2n ✶ ✶ ✵ XEX n/2 n ✷ ✵ ✵ LRW2[2] 2n/3 4n ✷ ✷ ✵ LRW2[ρ] ρn/(ρ+2) 2ρn ρ ρ ✵ Min max{n/2, n−|t|} n ✷ ✵ ✶ Min✲❳❚❳ 2n/3 7n/3 ✷ ✶ ✶ Men1 2n/3 ⋆ n ✶ ✶ ✶ Men2 n ⋆ n ✷ ✵ ✶

✺✵ ✴ ✺✷

⋆ ■♥❢♦r♠❛t✐♦♥✲t❤❡♦r❡t✐❝ ♠♦❞❡❧

slide-136
SLIDE 136

❖✉t❧✐♥❡ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❙❡❝✉r✐t② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ■♠♣r♦✈❡❞ ❊✣❝✐❡♥❝② ❢♦r ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚❇❈s ❈♦♥❝❧✉s✐♦♥

✺✶ ✴ ✺✷

slide-137
SLIDE 137

❈♦♥❝❧✉s✐♦♥

❇✐rt❤❞❛② ❇♦✉♥❞ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs

  • ▼②r✐❛❞ ❛♣♣❧✐❝❛t✐♦♥s t♦ ❆❊✱ ▼❆❈✱ ❡♥❝r②♣t✐♦♥✱ ✳ ✳ ✳
  • ❱❛r✐♦✉s s♦❧✉t✐♦♥s ❢♦r ❞✐✛❡r❡♥t ♣r♦❜❧❡♠s✿
  • ❊✣❝✐❡♥❝②
  • ❘❡❧❛t❡❞✲❦❡② s❡❝✉r✐t②
  • ✳ ✳ ✳

❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs ❆❧❧♦✇ ❢♦r ❜❡②♦♥❞ ❜✐rt❤❞❛② ❜♦✉♥❞ s❡❝✉r❡ ❆❊ ❊✣❝✐❡♥t s❝❤❡♠❡ ✇✐t❤♦✉t r❡✲❦❡②✐♥❣❄ ❖♥❡✲❝❛❧❧ t✇❡❛❦❛❜❧❡ ❝✐♣❤❡r ✇✐t❤ ✐♠♣r♦✈❡❞ s❡❝✉r✐t②❄ ❖♣t✐♠❛❧ s❡❝✉r✐t② ✐♥ st❛♥❞❛r❞ ♠♦❞❡❧❄

❚❤❛♥❦ ②♦✉ ❢♦r ②♦✉r ❛tt❡♥t✐♦♥✦

✺✷ ✴ ✺✷

slide-138
SLIDE 138

❈♦♥❝❧✉s✐♦♥

❇✐rt❤❞❛② ❇♦✉♥❞ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs

  • ▼②r✐❛❞ ❛♣♣❧✐❝❛t✐♦♥s t♦ ❆❊✱ ▼❆❈✱ ❡♥❝r②♣t✐♦♥✱ ✳ ✳ ✳
  • ❱❛r✐♦✉s s♦❧✉t✐♦♥s ❢♦r ❞✐✛❡r❡♥t ♣r♦❜❧❡♠s✿
  • ❊✣❝✐❡♥❝②
  • ❘❡❧❛t❡❞✲❦❡② s❡❝✉r✐t②
  • ✳ ✳ ✳

❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs

  • ❆❧❧♦✇ ❢♦r ❜❡②♦♥❞ ❜✐rt❤❞❛② ❜♦✉♥❞ s❡❝✉r❡ ❆❊
  • ❊✣❝✐❡♥t s❝❤❡♠❡ ✇✐t❤♦✉t r❡✲❦❡②✐♥❣❄
  • ❖♥❡✲❝❛❧❧ t✇❡❛❦❛❜❧❡ ❝✐♣❤❡r ✇✐t❤ ✐♠♣r♦✈❡❞ s❡❝✉r✐t②❄
  • ❖♣t✐♠❛❧ s❡❝✉r✐t② ✐♥ st❛♥❞❛r❞ ♠♦❞❡❧❄

❚❤❛♥❦ ②♦✉ ❢♦r ②♦✉r ❛tt❡♥t✐♦♥✦

✺✷ ✴ ✺✷

slide-139
SLIDE 139

❈♦♥❝❧✉s✐♦♥

❇✐rt❤❞❛② ❇♦✉♥❞ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs

  • ▼②r✐❛❞ ❛♣♣❧✐❝❛t✐♦♥s t♦ ❆❊✱ ▼❆❈✱ ❡♥❝r②♣t✐♦♥✱ ✳ ✳ ✳
  • ❱❛r✐♦✉s s♦❧✉t✐♦♥s ❢♦r ❞✐✛❡r❡♥t ♣r♦❜❧❡♠s✿
  • ❊✣❝✐❡♥❝②
  • ❘❡❧❛t❡❞✲❦❡② s❡❝✉r✐t②
  • ✳ ✳ ✳

❇❡②♦♥❞ ❇✐rt❤❞❛② ❇♦✉♥❞ ❚✇❡❛❦❛❜❧❡ ❇❧♦❝❦❝✐♣❤❡rs

  • ❆❧❧♦✇ ❢♦r ❜❡②♦♥❞ ❜✐rt❤❞❛② ❜♦✉♥❞ s❡❝✉r❡ ❆❊
  • ❊✣❝✐❡♥t s❝❤❡♠❡ ✇✐t❤♦✉t r❡✲❦❡②✐♥❣❄
  • ❖♥❡✲❝❛❧❧ t✇❡❛❦❛❜❧❡ ❝✐♣❤❡r ✇✐t❤ ✐♠♣r♦✈❡❞ s❡❝✉r✐t②❄
  • ❖♣t✐♠❛❧ s❡❝✉r✐t② ✐♥ st❛♥❞❛r❞ ♠♦❞❡❧❄

❚❤❛♥❦ ②♦✉ ❢♦r ②♦✉r ❛tt❡♥t✐♦♥✦

✺✷ ✴ ✺✷

slide-140
SLIDE 140

❙✉♣♣♦rt✐♥❣ ❙❧✐❞❡s ❙❯PP❖❘❚■◆● ❙▲■❉❊❙

✺✸ ✴ ✺✷

slide-141
SLIDE 141
  • ❡♥❡r✐❝ ❉❡s✐❣♥✿ ■♥✈❡rs❡

❱❛❧✐❞ ▼✐①✐♥❣ ❋✉♥❝t✐♦♥s ✭✐♥❢♦r♠❛❧✮ Ai, Bi ❛r❡ ✈❛❧✐❞ ✐❢ t❤❡r❡ ✐s ♦♥❡ Ai∗ t❤❛t ♣r♦❝❡ss❡s m✱ s✳t✳

  • ✜rst i∗ − 1 r♦✉♥❞s ❝♦♠♣✉t❛❜❧❡ ✐♥ ❢♦r✇❛r❞ ❞✐r❡❝t✐♦♥
  • ❧❛st ρ − (i∗ − 1) r♦✉♥❞s ❝♦♠♣✉t❛❜❧❡ ✐♥ ✐♥✈❡rs❡ ❞✐r❡❝t✐♦♥

❜♦t❤ ✇✐t❤♦✉t ✉s❛❣❡ ♦❢ m ❊①❛♠♣❧❡ ❢♦r i∗ = 2

m c

E E E

  • A1

A-1

2

  • A-1

3

  • A-1

4

B1 B2

  • B3

k, t k, t k, t, y1 k, t, y1 l1 x1 y1 l2 x2 y2 l3 x3 y3

✺✹ ✴ ✺✷