Intro to Bilinear Map
概要: 介绍双线性映射(Bilinear Map)的基本概念、定义、性质,以及双线性映射在密码学中的应用:MOV 攻击,单轮三方 DH 协议, Identity-Based Encryption 等。
Reed-Solomon code in McEliece and Niederreiter
概要: 介绍 Generalized Reed-Solomon Code(GRS),McEliece 和 Niederreiter 加密算法。GRS 虽然是非常高效的线性编码,但是在标准的 McEliece 中使用了 Goppa Code,而不是更简单高效的 GRS 编码,是因为 GRS 编码在上述两个密码体制中存在安全性问题,即 Sidelnikov-Shestakov attack。本篇博客是对 GRS 线性编码和其相关攻击的简单介绍。
HITCON CTF 2024 Qual Crypto Writeup
tl;dr: Writeups for crypto challenges of HITCON CTF qual. The specific tags are Algebraic Immunity Attack, Fast Correlation Attack, Matrix Trace, ZKP of Factoring.
R3CTF 2024 Crypto Writeup
tl;dr: Writeups for R3CTF 2024 including challenges r0,1,2system and TinySeal and SPARROW. Amazing challenges about: poly-nonce attack of ECDSA, BFV fully homomorphic encryption and linearization of symmetric cipher.
Geekcon CTF 2024 Writeup
tl;dr: Writeups for Geekcon CTF 2024 including challenges ZkMaze and all “real” crypto challenges. I ended up in 10th place and really appreciated the challenges. The topics related to the crypto challenges are HNP, RSA and bilinear map.