Another DES Method

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Article #462

#462

From: tom rollins
Date: Wed, 22 Jul 1992 15:15

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I don't have access the this (sci.crypt) Newsgroup
so please ONLY respond to my question via E-mail
    "tom.rollins@p5555.f349.n109.z1.fidonet.org"

My Question:
    I know about the several DES encryption methods:
        ECB - Electronic Code Book
        CBC - Cipher Block Chaining
        CFB - Cipher Feed Back
        OFB - Output Feed Back
        MAC - Message Authentication Code
        KSG - Key Stream Generator

    All these methods encrypt data 64 bits at a time.
    It has been suggested that I use a 1 bit or 8 bit
    CFB (Cipher Feed Back). Now I understand how to
    feed back 1 or 4 bits, But don't understand how
    it would improve the basic method. And it would
    add a lot of processing time to the encryption /
    decryption.

                                Thanks....
                                Tom Rollins

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Path: arc1-ca.pugleaf.net!sparky!uunet!paladin.american.edu!darwin.sura.net!mips!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!ucbvax!p5555.f349.n109.z1.fidonet.org!tom.rollins
From: tom.rollins@p5555.f349.n109.z1.fidonet.org (tom rollins)
Newsgroups: sci.crypt
Subject: Another DES Method
Message-ID: <711821102.F00005@blkcat>
Date: 22 Jul 92 15:15:25 GMT
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