Rc7 Cracked _verified_ -

This paper was published in 1999, and it presents a cryptanalytic attack on the RC7 block cipher. The authors claim to have found a practical attack that can recover the secret key.

The authors conclude that RC7 is not as secure as previously thought and that a large number of rounds can be distinguished from a random permutation. They also show that a practical attack on RC7 is feasible, which can recover the secret key. rc7 cracked

Here is the full paper: