RE: [TLS] Serious crypto problem fixed by envelope HMAC methodinstead of currently used prefix

"Blumenthal, Uri" <uri.blumenthal@intel.com> Mon, 27 November 2006 19:31 UTC

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Subject: RE: [TLS] Serious crypto problem fixed by envelope HMAC methodinstead of currently used prefix
Date: Mon, 27 Nov 2006 14:31:04 -0500
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Thread-Topic: [TLS] Serious crypto problem fixed by envelope HMAC methodinstead of currently used prefix
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From: "Blumenthal, Uri" <uri.blumenthal@intel.com>
To: TLS@lists.ietf.org
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>> SSLv3 used a variant of the original HMAC (pre-2104).
>> IIRC, SSLv2 didn't use HMAC and *did* have an extension
>> attack, but that's hardly our problem at this point.
>
> But does SSL v2 has the lenth field protection
> (as we discussed) against an extension attack?
> Can somebody send me the function used in SSL v2?

As SSLv2 is a technically-dead protocol (that is not thrown out from the
code only for compatibility reasons), how relevant is it now???

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