SLIDE 1
Zebranet
Monitor zebras:
- Vitals
- Loca2on
- Movement pa6erns
Challenges:
- Large living area
- Ba6ery has to last long
Pr Protocol Design Challeng l Design Challenge Zebranet Monitor - - PowerPoint PPT Presentation
Pr Protocol Design Challeng l Design Challenge Zebranet Monitor - - PowerPoint PPT Presentation
Pr Protocol Design Challeng l Design Challenge Zebranet Monitor zebras: Vitals Loca2on Movement pa6erns Challenges: Large living area Ba6ery has to last long 2me Zebranet Z2Z DATA DATA DATA Z2R A5acker(s) Collar
SLIDE 2
SLIDE 3
Zebranet
DATA DATA DATA
Z2Z Z2R
SLIDE 4
A5acker(s)
SLIDE 5
Collar
- Stores the zebra’s own data (1 KB each 15 minutes)
- f the last month
- Can store last month’s data of 99 other zebras (will
- verwrite the oldest data)
SLIDE 6
Some possible a5ack vector
Hunter shoots a zebra and opens up the collar:
- Gets all data stored on the collar including
cryptographic keys Hunter pushes false data to collar to mislead the rangers
SLIDE 7
Challenge
- Assump2ons
- A6acker model/what should the protocols protect
against
- Z2Z protocol
- Z2R protocol
- Mo2vate your design choices
SLIDE 8
Bonus points
APer the ranger has read out the collar of a zebra, the data on it are no longer relevant and hence wiped from the collar. Bonus: extend the Z2R protocol to authorize this wipe Bonus: a protocol to propagate the removal of these data to other zebras.
SLIDE 9
Bonus points (2)
Bonus: Draw the nicest zebra.
SLIDE 10
Bonus points (3)
Bonus: if you manage to incorporate a digital encoding of the zebra’s pa6ern.
SLIDE 11
Rules
- Teams up to 3 people (maybe team up with
someone from another university)
- Handwri6en, please do an effort to ensure
readability J
- Maximum 2 pages (4 sides) A4
(+1 if going for one of the bonuses)
- Give some intui2on, no excessive formalism
- S2ck with the nota2on on the next slide and
introduce any addi2onal nota2on
SLIDE 12
NotaCon
Subscipt zebra: i,j,k,l … subscript ranger: r Symmetric key: K_i Private key: priv_i public key: Pub_i Message to encrypt/authen2cate/sign/… : M Encryp2on: C = E(K, M) or E(Pub,M) Decryp2on: D(K,C) or D(priv,C) Authen2cated encryp2on: AC = AE(K,M) and AD(K,AC) Hash: H(M) Key deriva2on func2on: KDF(M) MAC: MAC(K,M) Signature: S = SIGN(priv,M) and VER(Pub,S) Ellip2c curves: A = aP with P the generator aB = bA = abP A+B = (a+b)P
SLIDE 13
Next steps
- Form teams and sit together
- We are here for addi2onal general ques2ons
- Deadline: Thursday 18:59:59 (before the dinner)
- Feedback + prizes: Friday
- Write down your names together with a RANDOM
6 digit number (one for each name)
SLIDE 14