What is TTH?
Tiger Tree Hashing or TTH is used to verify the integrity of large chunks of data. The data is split into small pieces which are individually hashed, then hashed together until one, root hash is formed. A TTH hash looks something like: UXNWMYERN37HJNXB7V6KDJKZXMFBIQAGMDMYDBY. Detailed information can be found here. DC++ 0.400 introduced mandatory TTH. Once DC++ hashes all of your share (yes this will take a while) it will only hash new files. The hashing thread in DC++ is set to low priority, so it shouldn’t interfere too badly. There are several benefits of file hashing: No longer does one need to pay attention to the name of the file when looking for alternative sources. If the files are the same, they will have the same hash and thus be chosen as an alternative source. About magnet links: Magnet links are simple references to a certain file containing a filename and some sort of hash. They can look like this: magnet:?xt=urn:tree:tiger:UXNWMYERN37HJNXB7V6KDJKZXMFBIQA GMDMYDBY&dn=DCPl
