Worked a major virus company. This was the same Basic technique. W e would download a list of all md5 hashes. All executables would have to match against it

Worked a major virus company. This was the same Basic technique. W e would download a list of all md5 hashes. All executables would have to match against it. Periodically there would be an issue downloading the updates. Would result in similar problems. Managing size of updates was a big issue. Just checking against an online server is certainly a more up to date approach