> Therefore, why not get the Americans to develop their best hashing algorithm, the Chinese to develop their best algorithm, and then use A(C(data)). Would it

> Therefore, why not get the Americans to develop their best hashing algorithm, the Chinese to develop their best algorithm, and then use A(C(data)). Would it not be better to report both A(data) and C(data) (or maybe all three), so you have to simultaneously find a collision in both? Using A(C(data)), finding a collision in C(data) gives a collision in A(C(data)) as well. Further, there are other considerations - it doesn't matter how secure the hash is if it's unusably slow.