Date: Thu, 14 Mar 2002 04:23:11 -0700 From: "John R. Shannon" <john@johnrshannon.com> To: "jack xiao" <jack_xiao99@hotmail.com>, <freebsd-security@FreeBSD.ORG> Subject: Re: AES Message-ID: <200203141123.g2EBNB7e006688@pablo.johnrshannon.com> In-Reply-To: <OE49JNoEl4jksr6UrKl000037bf@hotmail.com> References: <OE49JNoEl4jksr6UrKl000037bf@hotmail.com>
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AES and DES are compared on this AES fact sheet: http://csrc.nist.gov/encryption/aes/aesfact.html The problem with DES is that it's 56 bit key, which was adequate in the 70s, can be discovered by exhaustive keysearch. 3DES attacks this by applying DES 3 times: encrypt with 1 key, decrypt with a second, and encrypt with a third. The best known attack on 3DES is O(2^108) operations with something like 2^64 storage. The problem with 3DES, is it's high computational cost. On Wednesday 13 March 2002 08:54 pm, jack xiao wrote: > Hi, > > Can anybody show me some resource about the comparison between AES and 3DES > or DES? > > Thanks a lot! > > Jack > -- John R. Shannon john@johnrshannon.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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