Date: Sat, 30 May 1998 20:58:21 +1000 (EST) From: Darren Reed <avalon@coombs.anu.edu.au> To: sysadmin@mfn.org (J.A. Terranson) Cc: gpalmer@FreeBSD.ORG, opsys@mail.webspan.net, ckempf@enigami.com, freebsd-security@FreeBSD.ORG Subject: Re: MD5 v. DES? Message-ID: <199805301058.DAA29114@hub.freebsd.org> In-Reply-To: <01BD8B6C.68192890@w3svcs.mfn.org> from "J.A. Terranson" at May 30, 98 01:43:54 am
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In some mail from J.A. Terranson, sie said: > > > Actually, this question is nonsensical, as MD5 and DES are > two *entirely* different things. > > MD5 (Message Digest [algorithm] 5) is a *hash* function: It > does *NOT* encrypt! What is does is provide a "one way" > pseudo-signature based on the contents of the file it is run > against. What makes this a "one way" function is that you can > get a hash (signature) from a file, but you *cannot* get a file > from an hash! > > DES (Data Encryption Standard [modified LUCIFER]) is a two-way > *encryption* function. Not only can you reduce a file to an > indecipherable mess, but you can take the mess, and recover > the original file. Isn't MD-5 also classed as a cryptographic checksum or is that just limited to SHA-1 and RIPE-MD ? Darren To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe security" in the body of the message
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