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Re: [Rats] Attestation Timing Definitions

"Eric Voit (evoit)" <evoit@cisco.com> Wed, 11 March 2020 12:43 UTC

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From: "Eric Voit (evoit)" <evoit@cisco.com>
To: "Panwei (William)" <william.panwei@huawei.com>
CC: "rats@ietf.org" <rats@ietf.org>
Thread-Topic: [Rats] Attestation Timing Definitions
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Date: Wed, 11 Mar 2020 12:43:36 +0000
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Subject: Re: [Rats] Attestation Timing Definitions
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Hello Wei,

 

From: Panwei (William), March 10, 2020 11:30 PM



A minor update about the definition of expiry time：

 


time(h)

Time of Results expiry

Time stated by a Verifier when a specific instance of Attestation Results should no longer be accepted by a Relying Party

<eric> Agree with text tweak.

 

1.Simple Passport Model. 

This figure matches to the sequence diagram from Figure 4 of draft-ietf-rats-architecture.

 

   .----------.                     .----------.  .---------------.

   | Attester |                     | Verifier |  | Relying Party |

   '----------'                     '----------'  '---------------'

      time(a)                             |               |

      time(b)                             |               |

      time(e)                             |               |

        |------Evidence---------------->time(f)           |

        |                               time(g){@time(h)} |

        |                               time(j)           |

        |<-----Attestation Result-------time(i)           |

      time(k)--Attestation Result---------------------->time(l)

        |                                 |             time(h)

I think in this case the expiry time can also be included.

 

<eric> I agree time(h) can be supported by this case.   If these timing diagrams ever make it into a rats-draft then we will need to determine which subset of variants to present as many variants exist. 

 

Eric

 

Regards & Thanks!

潘伟 Wei Pan

华为技术有限公司 Huawei Technologies Co., Ltd.

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