Writeup for 中国技能大赛决赛 2019

Writeup for several problems in 2019 中国技能大赛——全国网络安全管理职业技能竞赛 决赛 (2019-11-23 19:00 - 2019-11-26 12:00)

Writeup for Crypto Problems in SUCTF 2019

Writeup for 4 crypto challenges in SUCTF 2019 (2019-08-17 09:00 +36h).
- (easy) DSA: exploit the reused ephemeral key k to break DSA
- (easy) Prime: factor n into 4 primes
- (easy) MT: reverse a modified MT algorithm
- (easy) RSA: crack a RSA parity oracle