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ISSUE-158: Add SHA-1 warnings [Sig11 (XML Signature 1.1)]

From: XML Security Working Group Issue Tracker <sysbot+tracker@w3.org>
Date: Mon, 14 Dec 2009 14:47:30 +0000 (GMT)
To: public-xmlsec@w3.org
Message-Id: <20091214144730.DA91F6B651@tibor.w3.org>

ISSUE-158: Add SHA-1 warnings [Sig11 (XML Signature 1.1)]


Raised by: Frederick Hirsch
On product: Sig11 (XML Signature 1.1)

(from email http://lists.w3.org/Archives/Public/public-xmlsec/2009Dec/0033.html )

Do we need more text in XML Signature 1.1 regarding the suitability  
(or lack thereof) of SHA-1, and maybe a reference to the NIST  
recommendation to use SHA2 going forward from 2010 as well as the  
crypto regarding SHA-1?

We probably also need to add this to the 1.1 requirements as well.

Does anyone have a good pointer to a paper outlining why SHA-1 is no  
longer suitable?

Is the suitable NIST reference the following, or is there a better one?

[[ March 15, 2006: The SHA-2 family of hash functions (i.e., SHA-224,
SHA-256, SHA-384 and SHA-512) may be used by Federal agencies for all
applications using secure hash algorithms. Federal agencies should
stop using SHA-1 for digital signatures, digital time stamping and
other applications that require collision resistance as soon as
practical, and must use the SHA-2 family of hash functions for these
applications after 2010. After 2010, Federal agencies may use SHA-1
only for the following applications: hash-based message authentication
codes (HMACs); key derivation functions (KDFs); and random number
generators (RNGs). Regardless of use, NIST encourages application and
protocol designers to use the SHA-2 family of hash functions for all
new applications and protocols. ]]

Received on Monday, 14 December 2009 14:47:32 UTC

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