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.
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.
How I pick up Golang in just one day.
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.