CraptEV1 and Crapto1

Official home

This is the official home of the craptev1 and crapto1 projects.


A restrictively licensed implementation of ciphertext only attacks against crypto1 cipher.

This code was released after piwi's code had reached some maturity. Later aczid also released a brute forcer patch. Their combined code will outperform my original code in almost all cases. You can find the patch by aczid here.


A gpl implementation of attacks against the crypto1 cipher which in one way or another rely on known plaintext or the weak nonce generation of the original mifare classic implementations.