What is "uuhash"

UUHash is a hash algorithm employed by clients on the FastTrack network. It is employed for its ability to hash very large files in a very short period of time, even on older computers. However, this is achieved by only hashing a fraction of the file. This weakness makes it trivial to create a hash collision, allowing large sections to be completely altered without altering the checksum.

This method is used by Kazaa. The weakness of UUHash is exploited by anti- p2p agencies to corrupt downloads.