Newer versions of eMule support AICH (Advanced Intelligent Corruption Handling). It is meant to make eMule's corruption handling competitive with BitTorrent. SHA-1 hashes are computed for each 180 KiB sub-chunk and a whole SHA-1 hash tree is formed. AICH is processed purely with peer-to-peer source exchanges. eMule requires 10 agreeing peers regarding the SHA-1 hash, so rare files generally do not benefit from AICH.