Date: Thu, 05 Feb 1998 22:53:20 -0500 From: Matthew Hagerty <wpub1@net-link.net> To: freebsd-questions@FreeBSD.ORG Subject: MD5 or Crypt? Message-ID: <3.0.1.32.19980205225320.00698648@smtp.net-link.net>
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Greetings, Could someone shine some light my direction regarding MD5? I'm running FreeBSD 2.2.5-release, USA. I am trying to make a one way hash to store my companies credit card numbers. I need to be able to verify a credit card but I don't want to store them in plain text. I need something similar to a password file for credit card numbers, that way I could hash the card being looked for and compare the hash values. Is MD5 a better choice than Crypt for this? Can I trust that the MD5 output will be unique for a given input (since the input will only be 12 to 16 characters, not huge files)? Also, is there a MD5 function like crypt() that I can call from inside my programs (C/C++)? I've poked around the man pages and the handbook, but I cannot find anything very specific. Thank you, Matthew --------------- Matthew Hagerty wpub1@net-link.net ---------------
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