From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,9d00a7db22818139 X-Google-Attributes: gid103376,public X-Google-Thread: fb57f,9d00a7db22818139 X-Google-Attributes: gidfb57f,public X-Google-ArrivalTime: 2001-03-04 05:22:10 PST Path: supernews.google.com!sn-xit-03!sn-xit-01!supernews.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!dispose.news.demon.net!demon!btnet-peer0!btnet!news5-gui.server.ntli.net!ntli.net!news2-win.server.ntlworld.com.POSTED!not-for-mail From: "Sam Simpson" Newsgroups: comp.lang.ada,sci.crypt References: <983158039.27320.0.nnrp-08.9e98cc46@news.demon.co.uk> <3A9ADBAE.EFF0B8AC@multiweb.nl> <3A9B242E.D7D177A8@earthlink.net> <3AA239E8.BB9AA911@multiweb.nl> Subject: Re: Arcfour in Ada X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 Message-ID: Date: Sun, 4 Mar 2001 13:18:06 -0000 NNTP-Posting-Host: 62.255.183.90 X-Complaints-To: abuse@ntlworld.com X-Trace: news2-win.server.ntlworld.com 983711757 62.255.183.90 (Sun, 04 Mar 2001 13:15:57 GMT) NNTP-Posting-Date: Sun, 04 Mar 2001 13:15:57 GMT Organization: ntl Cablemodem News Service Xref: supernews.google.com comp.lang.ada:5403 sci.crypt:18835 Date: 2001-03-04T13:18:06+00:00 List-Id: Thomas Boschloo wrote in message news:3AA239E8.BB9AA911@multiweb.nl... > > Benjamin Goldberg wrote: > > > > Thomas Boschloo wrote: > > > > http://fling.sourceforge.net/wiki/index.php?full=arcfour > > > > > > Why did you decide to go for arcfour and not the AES > > > http://www.nist.gov/aes ? AFAIK Arcfour or RC4 was originally a > > > 'security by obscurity' cypher (Arcfour was (now illegal) reverse > > > engineered from RC4 by www.rsa.com). > > > > Arcfour is not illegal, but the name "RC4" is trademarked. To use a > > cipher called "RC4" without liscencing that trademark is illegal. To > > use the algorithm is perfectly legal. > > I guessed with the new DMCA (digital millenium copyright act), reverse > engineering RC4 might be deemed illegal as it possibly could be seen as > some form of 'protection' that is circumvented. I mean, what is all the > fuzz about DeCSS, 2600, eff about?! IANAL. It may be illegal now, but the the public release of RC4 predates DMCA. > Funny that DoD doesn't have Rijndael in Ada, as they developed Ada in > the first place :-P I'm sure they do have AES in Ada, but that doesn't mean they have to publish the fact? > > > Couldn't you just use the 128 bit block size of Rijndael as a > > > (somewhat small) buffer for your traffic? Be honest, what would be the > > > overhead from the 128 bit boundaries? > > > > How much overhead? I'd say up to 128 bits. Plus having a 128 bit IV. Use one of the chaining modes that can encrypt single bytes etc. > > > AES seems so much more secure in the long run than RC4! > > > > But AES is slower, more awkward, and has more overhead. Only if used in CBC. > > Also, even if > > ARC4 might not be not quite as secure as AES, it is surely *secure > > enough* for this application. Good point.... -- Regards, Sam http://www.scramdisk.clara.net/