Subject: [Tsvwg] Re: CRC-32Q

From: "Julian Satran" <[email-masked]>
Date: Tue, 14 Aug 2001 13:40:39 +0300

CRC32Q was considered (and for a while preferred).  CRC32C displays the
largest hamming distance for longer blocks
(proven by enumeration on a hardware simulator).  Both are better than
ITU-CRC32 and IEEE-CRC32 (the Ethernet).
IEEE-CRC32 is a "prime" polynomial and thus basically "weaker" than either
CRC32Q or CRC32C.

Julo

[email-masked] on 13-08-2001 18:56:41

Please respond to [email-masked]

To:   Julian Satran/Haifa/IBM@IBMIL, [email-masked],
      [email-masked]
cc:
Subject:  CRC-32Q

This just turned up on TSVWG.  Can you resurrect the
discussion of CRC-32Q and why it was laid aside in
preference to CRC-32C?  Please answer directly to the
tsvwg list (see end of forwarded message).

Thanks,
--David

-----Original Message-----
From: Michael A. Ramalho [mailto:[email-masked]]
Sent: Monday, August 13, 2001 9:40 AM
To: TSV WG list
Subject: Re: [Tsvwg] CRC draft from IPS working group

All,

Anyone know why CRC32Q(Wolf) was not presented
in the summary table in Section 6 of this draft?

[The author's email addresses were not in the draft.]

I presume that CRC32Q's properties are nearly equivalent
to IEEE-802 and CRC32C. Yet it uses different polynomial.
So, it is a candidate for the people desiring of something
different than some link CRCs (IEE-802) and some
application CRCs (32C).

Michael Ramalho

At 08:02 AM 8/8/2001 -0500, Randall Stewart wrote:
>Dear All:
>
>Serving as a proxy for David Black, here is the
>IPS draft that discusses various CRC's
>
>Enjoy
>
>http://search.ietf.org/internet-drafts/draft-sheinwald-iscsi-crc-00.txt
>
>
>R
>
>--
>Randall R. Stewart
>[email-masked] 815-342-5222 (cell phone)
>
>_______________________________________________
>tsvwg mailing list
>[email-masked]
>http://www1.ietf.org/mailman/listinfo/tsvwg

Michael A. Ramalho, Ph.D.
Office email: [email-masked]
Personal email: [email-masked]
Summer Office: +1.941.923.1203 (July/Aug 2001)
Office: +1.732.449.5762
Cell: +1.732.809.0188

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