sorry, perhaps a bit offtopic..
there is this excellent 'whitelist' project:
http://www.nsrl.nist.gov/seems it hasn't been mentioned here before. Its aim is to catalog hashes (md5 and sha, iirc) of all (executable) files! Yes, there are some Amiga files in the database. That should help a lot in tracking down viruses and such. There is also that site with Kickstart (and Workbench) hashes.
Anyway, I think, if nsrl site accepts submissions, people with lot of original software should help.