crypto

2025-03-17 Insomni'hack 2025 - revengery
// forge ECDSA signature to takeower the ownership of a Solidity contract
2024-02-10 Gold CTF 2024 — digger
// reversing crypto binary to achieve slide attack primitive
2023-04-25 RuCTF Finals 2023 — solaris
// attacking matrix-based cryptosystem using Coppersmith method
2022-12-11 Russian CTF Cup 2022 — babyrsa
// collect impossible remainders and use CRT to retrieve RSA factor
2022-09-08 FAUST CTF 2022 — Notes from the Future
// predicting random output to forge proof of knowledge scheme
2022-05-22 RuCTF 2022 — ambulance
// exploiting arbitrary free in CPython library to gain RCE
2021-05-15 m0leCon CTF 2021 Teaser — Obscurity
// attacking FCSR state to recover keystream
2021-05-15 m0leCon CTF 2021 Teaser — Giant log
// calculate discrete log using p-adics
2021-05-15 m0leCon CTF 2021 Teaser — Alternating key exchange
// using meet-in-the-middle approach to attack non-commutative scheme
2020-12-26 RuCTF 2020 — notary
// detect the low-entropy PRNG and attack the KMOV cryptosystem
2020-09-09 CONFidence CTF 2020 Finals — ElGamal
// mapping to the additive group using invalid curve attack
2020-05-24 m0leCon CTF 2020 Teaser — King Exchange
// recovering group structure of a circle to calculate discrete log