Tokyo Westerns/MMA CTF 2016 – Pinhole Attack (Crypto 500)

Decrypt the cipher text with a pinhole. $ nc 23464 pinhole.7z Summary: attacking RSA using decryption oracle leaking 2 consecutive bits in the middle.


Dobbertin Challenge 2012

The Dobbertin Challenge is issued every two years since 2006, in honor and memory of Prof. Hans Dobbertin. A simple JSON Web Service is provided, which processes PIN codes of users. A user can send his encrypted PIN to the Web Service, which decrypts and stores the PIN. The Web Service allows to use… Continue reading »