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Re: [lamps] LAMPS sample keys and certificates

Daniel Kahn Gillmor <dkg@fifthhorseman.net> Mon, 23 December 2019 20:15 UTC

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From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
To: Russ Housley <housley@vigilsec.com>
Cc: LAMPS WG <spasm@ietf.org>
In-Reply-To: <4AE80A23-9698-4C6D-8DE9-320AAEA71E10@vigilsec.com>
References: <878sodm0j3.fsf@fifthhorseman.net> <23953F0E-F919-4BBD-998F-11FF0DDBD95F@vigilsec.com> <87r20ya78o.fsf@fifthhorseman.net> <4AE80A23-9698-4C6D-8DE9-320AAEA71E10@vigilsec.com>
Autocrypt: addr=dkg@fifthhorseman.net; prefer-encrypt=mutual; keydata= mDMEXEK/AhYJKwYBBAHaRw8BAQdAr/gSROcn+6m8ijTN0DV9AahoHGafy52RRkhCZVwxhEe0K0Rh bmllbCBLYWhuIEdpbGxtb3IgPGRrZ0BmaWZ0aGhvcnNlbWFuLm5ldD6ImQQTFggAQQIbAQUJA8Jn AAULCQgHAgYVCgkICwIEFgIDAQIeAQIXgBYhBMS8Lds4zOlkhevpwvIGkReQOOXGBQJcQsbzAhkB AAoJEPIGkReQOOXG4fkBAO1joRxqAZY57PjdzGieXLpluk9RkWa3ufkt3YUVEpH/AP9c+pgIxtyW +FwMQRjlqljuj8amdN4zuEqaCy4hhz/1DbgzBFxCv4sWCSsGAQQB2kcPAQEHQERSZxSPmgtdw6nN u7uxY7bzb9TnPrGAOp9kClBLRwGfiPUEGBYIACYWIQTEvC3bOMzpZIXr6cLyBpEXkDjlxgUCXEK/ iwIbAgUJAeEzgACBCRDyBpEXkDjlxnYgBBkWCAAdFiEEyQ5tNiAKG5IqFQnndhgZZSmuX/gFAlxC v4sACgkQdhgZZSmuX/iVWgD/fCU4ONzgy8w8UCHGmrmIZfDvdhg512NIBfx+Mz9ls5kA/Rq97vz4 z48MFuBdCuu0W/fVqVjnY7LN5n+CQJwGC0MIA7QA/RyY7Sz2gFIOcrns0RpoHr+3WI+won3xCD8+ sVXSHZvCAP98HCjDnw/b0lGuCR7coTXKLIM44/LFWgXAdZjm1wjODbg4BFxCv50SCisGAQQBl1UB BQEBB0BG4iXnHX/fs35NWKMWQTQoRI7oiAUt0wJHFFJbomxXbAMBCAeIfgQYFggAJhYhBMS8Lds4 zOlkhevpwvIGkReQOOXGBQJcQr+dAhsMBQkB4TOAAAoJEPIGkReQOOXGe/cBAPlek5d9xzcXUn/D kY6jKmxe26CTws3ZkbK6Aa5Ey/qKAP0VuPQSCRxA7RKfcB/XrEphfUFkraL06Xn/xGwJ+D0hCw==
Date: Mon, 23 Dec 2019 13:47:45 -0500
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Subject: Re: [lamps] LAMPS sample keys and certificates
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On Mon 2019-12-23 11:29:51 -0500, Russ Housley wrote:
> A comment about Section 8.6: Triple-Wrapping was never envisioned as a
> mechanism for integrity protection of mail header.  Rather, when a
> mail list agent is involved, the outermost signature is applied by the
> mail list agent to protect the mail list expansion history.  This
> history is needed to detect loops.

Thanks for the feedback, Russ.  I've actually heard people contemplating
the use of triple-wrapping for providing cryptographic authenticity and
integrity in a non-mail-list context as well, but i've hardly ever seen
it used in practice.

If you have any suggested text amendments for this section, i'd be happy
to incorporate your feedback.

   --dkg

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