Writeup
Writeup for 3 easy crypto challenges of VolgaCTF 2020.
In this post, we give a concise study of several attaks against DSS , including, reused $k$, $k$ generated via LCG, and lattice attack against short $k$.
Reproduction of James Manger’s chosen ciphertext attack on RSAES-OAEP under decryption oracle.
In this post, we give some underlying about two easy factorization methods under some specified circumstances.
Writeup
Writeup, by X1cT34m, for several problems in 2020 高校战“疫”网络安全分享赛 (2020-03-07 09:00 +48h).
Writeup
Leaked length information on the nonce $k$ could be exploited to break DSA.
Writeup
VN公开赛前三道Crypto题的出题思路
Writeup
Break a 150-D GGH cryptosystem using Nguyen’s Attack by reducing the problem to a special CVP which is much easier than the general problem.
Writeup
Brief writeup for all the crypto challenges in hgame 2020.
A gentle introduction to lattice cryptography by solving a 2-D NTRUEncrypt CTF challenge.