Quote:
Originally posted by TankGirl
If hashing is applied to partial chunks as well (which is needed anyway if incomplete files are utilized as sources for multisourced downloads), the integrity of the data can be safeguarded at a lower level.
- tg 
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How low is this level going to be. If it's too high, then there's a good chance that the rogue source will have contributed to that chunk and the entire chunk will have to be thrown away. On the other hand, if the level is small, a large amount of hash data has to be sent.