Our work for “天融信杯”第五届（2020年）全国高校密码数学挑战赛
Writeup for 3 crypto challenges in “第五空间” 智能安全大赛 2020 (2020-06-24 09:00 +12h).
- (easy) rosb: RSA common modulus attack
- (medium) UnSafeAES: AES-GCM nonce reuse && forbidden attack
- (interesting) tinysocks: redirect attack on Shadowsocks stream ciphers.
A plain record of the first half year of 2020, some feelings about the first internship, and a dazed plan.
Upgrade SageMath and solve several problems occurred during upgrading.
Ethereum has three trees: the state tree, the transaction tree, and the receipt tree. Why do we need three trees? Can we discard one of them? In this post, we explore the principles of the construction of the three trees.
Writeup for several problems in De1CTF 2020 by X1cT34m.
Something I want to do.
Writeup for 3 crypto challenges in 虎符CTF 2020 (2020-04-19 09:00 +8h).
- (easy) GM: recover every bit of RSA message by using legendre symbol
- (medium) mceliece: break a Mceliece cryptosystem with small parameters
- (easy) pell: solve specified pell equations.