Article View: alt.security.pgp
Article #195Re: What is Checksum, CRC and MD5 hash???
From: 0
Date: Sun, 17 Dec 1995 00:00
Date: Sun, 17 Dec 1995 00:00
30 lines
2743 bytes
2743 bytes
vawjr08@ibm.net wrote:
>CRC is the remainder after logically dividing (use XOR instead of subtract) a
>message/record/whathaveyou by a 'polynomial'. A well chosen polynomial finds
>most common transmission errors. CRC16 has a polynomial of:
>x^16 + x^15 + x^2 + 1
>when doing the divide, you'll be left with a remainder which fits into 16 bits.
>if this is then appended to the original message, the reciver simply does the
>divide over the entire datastream and gets 0 as the remainder.
>MD5 - damifino... I haven't worked with it, nor read anything about it
>Victor A. Wagner, Jr. Key fingerprint = 4D 20 EB F6 01 01 B0 69
^^^^^^^^^^^^^^^
Whether you know it or not, you certainly have worked with it :-)
>CFO Metadigm, Inc. 38 17 8D BF C8 46 E4 7A
>Vice-Chair Orange County (CA) Libertarian Party http://www.lp.org/lp/
>The five most dangerous words in the English language: "There oughtta be a law"
- Executioner/[Independent]
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 115914,6fde8c59366160eb X-Google-Attributes: gid115914,public X-Google-Thread: f6126,2858973aa00a1ec9 X-Google-Attributes: gidf6126,public X-Google-Thread: f7536,6fde8c59366160eb X-Google-Attributes: gidf7536,public X-Google-Thread: 10db24,6fde8c59366160eb X-Google-Attributes: gid10db24,public X-Google-Thread: 112044,6fde8c59366160eb X-Google-Attributes: gid112044,public X-Google-Thread: 10304d,6fde8c59366160eb X-Google-Attributes: gid10304d,public X-Google-Thread: f8b5f,6fde8c59366160eb X-Google-Attributes: gidf8b5f,public X-Google-Thread: fcd68,6fde8c59366160eb X-Google-Attributes: gidfcd68,public From: 0@0.0 Subject: Re: What is Checksum, CRC and MD5 hash??? Date: 1995/12/17 Message-ID: <4b1tr9$h8d@cliff.island.net> X-Deja-AN: 122277812 distribution: inet references: <4aj5d1$r5v@nntp.igs.net> <4ajfd2$2l1m@news-s01.ny.us.ibm.net> organization: Island Internet Inc. - (604) 753-2383 newsgroups: alt.security.pgp,alt.industrial.computing,alt.comp.virus,cern.computing,comp.ai.edu,comp.arch.arithmetic,comp.compression,comp.edu,comp.hardware,comp.org.decus,comp.org.ieee,comp.programming