I had heard that although it's easy to implement message digest functions like MD5, SHA-1, SHA-256 etc. in CUDA (or any other GPU platform), it is impossible to implement bcrypt there.
bcrypt is different from these hash functions, in that Blowfish is a block cipher, and in order to produce a one way hash a "feed back" is used.
I am not too familiar with the GPU platforms. Does anyone know if bcrypt can be ported to a GPU and if not, why?
