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Re: FW: Fwd: Surreptitious Forwarding

From: Joseph M. Reagle Jr. <reagle@w3.org>
Date: Wed, 01 Aug 2001 13:49:59 -0400
Message-Id: <>
To: "Plambeck, Thane" <tplambeck@verisign.com>, Don Davis <ddavis@curl.com>
Cc: "'xml-encryption@w3.org'" <xml-encryption@w3.org>
Thank you for putting proposals out there, makes things a bit more concrete. 
I would like to keep it short, and I also don't want to imply "correction" 
or "detection" as that is counter to the warnings we're trying to make. So, 
how about the following for Encryption:

>When an encrypted envelope contains a signature, the signature does not 
>necessarily protect the authenticity or integrity of the ciphertext [Davis].
>Furthermore, while the signature secures plaintext it only covers that 
>which is signed, recipients of encrypted messages must not infer integrity 
>or authenticity of other unsigned information (e.g., headers) within the 
>encrypted envelope, see [XMLDSIG, 8.1.1 Only What is Signed is Secure].

Joseph Reagle Jr.                 http://www.w3.org/People/Reagle/
W3C Policy Analyst                mailto:reagle@w3.org
IETF/W3C XML-Signature Co-Chair   http://www.w3.org/Signature
W3C XML Encryption Chair          http://www.w3.org/Encryption/2001/
Received on Wednesday, 1 August 2001 13:52:23 UTC

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