$ ctf42

#discrete-log CTF challenges

10 CTF challenges using discrete-log from 9 CTFs (2021–2024), 10 with writeups. Mostly Crypto (90%) and Misc (10%).

Crypto · 9 Misc · 1

Often combined with

#diffie-hellman 2 #smooth-p-1 1 #elgamal-variant 1 #pohlig-hellman 1 #ecdlp 1 #ecc 1 #2-adic 1 #quadratic-residue 1 #binary-search-factoring 1 #rsa 1 #lsb-oracle 1 #partial-key-exposure 1 #bsgs 1 #nist-p256 1 #ecdsa 1

Challenges

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Challenge CTF Weight Category Has
Bits CSAW 2021 Quals 20.54 Crypto files wu 3
dividing_secrets corCTF 2021 24.92 Crypto files wu 2
dhke_intro UIUCTF 2021 – Crypto files wu 2
linda Crypto 2021 36.00 Misc files wu 1
yaonet DiceCTF 2024 Quals 54.40 Crypto files wu 1
Clever_Thinking UofTCTF 2024 23.90 Crypto files wu 1
sequoa hxp 2022 – Crypto files wu 1
gipfel hxp 2021 99.41 Crypto files wu 1
yadlp DownUnderCTF 2021 – Crypto files wu 1
Z2kDH WolvCTF 2023 24.33 Crypto files wu 1