You can do that with HUGE. It also describes the encoding between the two nulls, then the new GET request. I think it preferes SHA1 for the hash, but which you use is flexible, CRC, MD5...

The question I have, which is the best algorithm? Can someone give a summary/overview? Hmm, it should be unique enough within a typical horizon (high security is not the topic), small in size (to keep broadcast traffic low), fast to calculate.