On Sun, 15 Dec 2019 20:23:25 -0600, Ron <ronljohnsonjr@xxxxxxxxx> wrote: >On 12/15/19 3:59 PM, George Neuner wrote: > >> On long text CRC will not be as discriminating as a real cryptohash, > >When specifying a 4 byte hash, something must be sacrificed... Obviously. But the main point is that CRC never was designed to uniquely fingerprint data - it was designed to detect corruption of the data, which is a much weaker guarantee than the cryptodigest hashes. Despite being the same length as an MD5 hash, a 128-bit CRC still might not be as discriminating ... it depends greatly on the CRC polynomial used and on the length of the input. George
