PlaidCTF 2019 - Horst

tldr; Feistel network with constant round key + permutations

Insomni'hack 2019

PHPPrivate tldr; invalid prepare SQL function

Teaser CONFidence CTF 2019 - Really Suspicious Acronym

tldr; RSA factorization with approximated p/q ratio writeups

Writeups for

Nullcon 2019 - Singular

tldr; discrete log on singular curve

CTFZone quals 2018 - WhateverNote

tldr; BREACH attack on TLS1.2 with AES GCM (HTTP level compression)

JHtC4BSK barsa

Crypto ctf challenge for JHtC team. Source code The page have two standard functionalities: user registration and logging in. After playing with them for a while we can see that authentication is based on “auth” cookie, which contains two long numbers separated by dash. Next thing to check is html source. After not looking at robots.txt, we do not get encrypted zip file with challenge’s source code. src/static » unzip -l Archive: Length ...