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Re: [Rats] Android attestations: Re: draft-richardson-rats-usecases-00 comments

Michael Richardson <mcr+ietf@sandelman.ca> Wed, 19 June 2019 02:31 UTC

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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Anders Rundgren <anders.rundgren.net@gmail.com>
cc: Thomas Fossati <Thomas.Fossati@arm.com>, Laurence Lundblade <lgl@island-resort.com>, "rats@ietf.org" <rats@ietf.org>, Anthony Nadalin <tonynad=40microsoft.com@dmarc.ietf.org>
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Comments: In-reply-to Anders Rundgren <anders.rundgren.net@gmail.com> message dated "Fri, 19 Apr 2019 08:08:10 +0200."
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Date: Tue, 18 Jun 2019 22:31:42 -0400
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Subject: Re: [Rats] Android attestations: Re: draft-richardson-rats-usecases-00 comments
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Anders Rundgren <anders.rundgren.net@gmail.com> wrote:
    > Here you have another link:
    > https://developer.android.com/training/articles/security-key-attestation

    > As an application developer I find this scheme and the associated
    > "AndroidKeyStore" quite impractical.  The recent addition of
    > "StrongBox" makes it worse.

Interesting. What is it that you find that you can not do?

    > With a two-level TEE/SE session-key based scheme you only need to
    > attest the session permitting you to perform any number of secure
    > operations and close the session with a "commit" which in turn responds
    > with a (session signed) message to the SP that everything went right.

Or is this what you wish you had?


--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
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