I'm looking for bitrot in archives, not outside attackers. Quick, fast, and easy is the way to go for me. Thanks for the suggestion! On Fri, Nov 1, 2013 at 1:05 PM, Christopher Head wrote: > > > William Couture wrote: > >Does anyone have an experience with a FAST program that will generate > >CRC (or MD5 or SHA) info for files? > > In my experience, any decently implemented MD5 program will be disk-bound= , > and thus as fast as possible (or maybe I just have crappy disks=85). For > Linux, I use the standard md5sum utility quite often. For Windows, I have > used the md5summer program , which uses the same file > format so you can share hash catalog files between the two. > > MD5 has some known weaknesses in crypto circles, but AFAIK the only break > that has actually happened so far is a collision attack, which is > irrelevant for your purposes=97a collision attack only allows an attacker= to > convince you that two different files are identical if they provide a > significant part of both files. For your purposes, YOU provide the origin= al > files, so MD5 should be able to protect against even malicious > modification=97successfully breaking that would require a second preimage > attack=97and it'll certainly be good enough for accidental file damage. > -- > Christopher Head > Sent from my phone; if you need a digital signature, ask for a resend. > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 Psst... Hey, you... Buddy... Want a kitten? straycatblues.petfinder.org --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .