Project Sekai - ✅-crypto-caterpie

Caterpie - 500 points

Category: Crypto Description: A small cryptosystem for a small pokemon. At least it's safe against quantum computers, right? Author: aparker Files:

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Sutx pinned a message to this channel. 04/28/2023 7:59 PM

@unpickled admin bot wants to collaborate

@fleming wants to collaborate

ngl this might just be weak params (edited)

@layka_ wants to collaborate

this RLWE

22:48

the sus thing is that e and s are related

isnt that #✅-crypto-ekans

22:52

that they are related

22:52

lol

22:52

this one is just:

s = gen_error_vec()
e = gen_error_vec()

@Violin wants to collaborate

unpickled admin bot

isnt that #✅-crypto-ekans

cannot see that channel

uhh

23:09

/ctf workon ekans

unpickled admin bot

this one is just:

s = gen_error_vec()
e = gen_error_vec()

the first secret

well not here (edited)

23:09

on ekans e is the reverse of s

aaa this was ekans

ye

23:11

join that one rq

@Utaha wants to collaborate

so this one q and DIM has changed, but e and s are no longer related (edited)

10:14

I dont see a way to exploit the fact that q is not prime

10:14

probably just lattice attack

s = [3, -1, -2, 1, 1, 0, 3, -1, 4, 3, 3, -1, 2, -1, -1, -1, -3, -3, -1, -1, 4, -1, 4, -2, 2, -2, 1, -2, -1, -3, -1, 2, 0, -4, -2, 1, -3, -2, -2, 2, 1, 0, -1, -1, 0, 2, 0, -1, 2, 3, 3, -1, -2, 0, -3, -1, -5, -2, 2, 1, 4, 0, -4, 2]

Utaha

used /ctf solve

✅ Challenge solved.

damn

11:12

too pro