🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: sci.crypt
Article #3395

Re: bitwise exclusive-or

#3395
From: gwyn
Date: Sun, 08 Feb 1987 03:32
13 lines
1280 bytes
In article <875@mecc.MECC.COM> sewilco@mecc.UUCP (Scot E. Wilcoxon) writes:
>It is very easy for an exclusive-or to fail.  Too many zeroes and plain
>text is the result.  Too many ones and it is inverted plain text.

That wasn't my point at all, and is a common misconception.
If the encryptor is functioning properly, there will have to
eventually be isolated stretches of 0s in the key that produce
plaintext in the cipher stream, but there is no way for the
cryptanalyst to distinguish these occurrences from other
apparent plaintext sequences that are purely fortuitous.

My actual point was that hardware FAILS from time to time.
Shift registers stop shifting, or-ers lose their keys, etc.
Technical Details
Message-ID: <5601@brl-smoke.ARPA>
Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!rutgers!seismo!brl-adm!brl-smoke!gwyn
References: <434@ethz.UUCP> <5580@brl-smoke.ARPA> <875@mecc.MECC.COM>

Show Full Headers
Complete Article Headers
Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!rutgers!seismo!brl-adm!brl-smoke!gwyn
From: gwyn@brl-smoke.UUCP
Newsgroups: sci.crypt
Subject: Re: bitwise exclusive-or
Message-ID: <5601@brl-smoke.ARPA>
Date: Sat, 7-Feb-87 22:32:12 EST
Article-I.D.: brl-smok.5601
Posted: Sat Feb  7 22:32:12 1987
Date-Received: Sun, 8-Feb-87 08:26:09 EST
References: <434@ethz.UUCP> <5580@brl-smoke.ARPA> <875@mecc.MECC.COM>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 13