17 Dec
2003
17 Dec
'03
11:17 p.m.
I've heard of that, but I thought it was only a redundancy check to check for read errors in the swiping process.
That's why they use checksums - I have some information about the VISA-net authorization network (which came from Phrack) and also some about the actual encoding of the card, if anyone cares. -jon ( --------[ Jonathan D. Cooper ]--------[ entropy@intnet.net ]-------- ) ( PGP 2.6.2 keyprint: 31 50 8F 82 B9 79 ED C4 5B 12 A0 35 E0 9B C0 01 ) ( home page: http://taz.hyperreal.com/~entropy/ ]---[ Key-ID: 4082CCB5 )