T1 T in: (T1,1); (T2,3) wit: sig 1 ; sig 2 out: 1 BTC: fun(x) . - - PowerPoint PPT Presentation

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T1 T in: (T1,1); (T2,3) wit: sig 1 ; sig 2 out: 1 BTC: fun(x) . - - PowerPoint PPT Presentation

Jun 13, 2023 282 likes •764 views

T1 T in: (T1,1); (T2,3) wit: sig 1 ; sig 2 out: 1 BTC: fun(x) . e1 2 BTC: fun(y) . e2 absLock: after 2018.12.17 T2 relLock: 2 days after T1 Block n-2 Block n-1 Block n Transactions: T1 Transactions: Transactions: T2

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in: (T1,1); (T2,3) wit: sig1; sig2

  • ut:

1 BTC: fun(x) . e1 2 BTC: fun(y) . e2 absLock: after 2018.12.17 relLock: 2 days after T1 T T1 T2

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  • Transactions:

...

Block n-1

Transactions:

T1 T2 T ...

Block n

Transactions:

...

Block n-2

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  • Transactions:

...

Block n-1

Transactions:

T1 T2 T ...

Block n

Transactions:

...

Block n-2

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  • H(Blockn-2)

Transactions:

...

Block n-1

H(Blockn-1) Transactions:

T1 T2 T ...

Block n

H(Blockn-3) Transactions:

...

Block n-2

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  • Block n-1

Block n Block n-2

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  • Block n-1

Block n Block n-2 Block n-1

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  • Block n-1

Block n Block n-2 Block n-1 Block n+1

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  • Block n-1

Block n Block n-2 Block n-1 Block n+1

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  • Block n-1

Block n Block n-2 Block n-1 Block n+1

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  • Block n-1

Block n Block n-2 Block n-1 Block n+1 Block n+1

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  • Block n-1

Block n Block n-2 Block n-1 Block n+1 Block n+1 Block n+2

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  • Block n-1

Block n Block n-2 Block n-1 Block n+1 Block n+1 Block n+2

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  • Block n-1

Block n Block n-2 Block n-1 Block n+1

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  • H( H(blockn-1) || {Ti} || Nonce) < Target

H(Blockn-2) Nonce Transactions:

...

Block n-1

H(Blockn-1) Nonce Transactions:

T1 T2 T ...

Block n

H(Blockn-3) None Transactions:

...

Block n-2

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  • H( H(blockn-1) || {Ti} || Nonce) < Target

H(Blockn-2) Nonce Transactions:

...

Block n-1

H(Blockn-1) Nonce Transactions:

T1 T2 T ...

Block n

H(Blockn-3) None Transactions:

...

Block n-2

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  • H( H(blockn-1) || {Ti} || Nonce) < Target
  • Nonce
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Block n-1 Block n Block n-1 Block n+1 Block n+1

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  • H(Blockn-2)

Nonce Transactions: TCoinbase

...

Block n-1

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  • ○
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  • Hardware

Introduction Hash rate (h/s) CPU 2009 105-108 GPU late 2010 106-109 FPGA Mid 2011 108-1010 ASIC Early 2013 1010-1013

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  • ○
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  • ○

○ ○

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f < 1 γ > λβ λ > 1 λ2 - fλ + 1 ≥ 0 S S

e-Ω(λ^3 k)

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  • ➝
  • ○

○

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  • ○

○

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○

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