$ ctf42

#isogeny CTF challenges

6 CTF challenges using isogeny from 6 CTFs (2021–2025), 6 with writeups.

Crypto · 6

Often combined with

#csidh 2 #oblivious-transfer 1 #sqisign 1 #torsion-point-attack 1 #sidh 1 #supersingular-elliptic-curve 1

Challenges

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Challenge CTF Weight Category Has
why_is_a_raven Union 2021 24.34 Crypto files wu 2
Last_Flight SECCON 2025 Quals – Crypto files wu 1
Pwn_Chall TeamItaly 2023 24.88 Crypto files wu 1
not_csidh hxp 2022 – Crypto files wu 1
seaside DiceCTF 2023 36.70 Crypto files wu 1
Alter_Ego SekaiCTF 2025 55.00 Crypto files src wu 1