Epoch Markers as Handles #25
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henkbirkholz
requested review from
thomas-fossati,
William-PanWei and
cabo
as code owners
thomas-fossati
approved these changes
Jul 10, 2023
draft-birkholz-rats-epoch-markers.md
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| @@ -135,6 +135,8 @@ In general, there are three interaction models: | |||
| * unsolicited distribution (e.g., via uni-directional methods, such as broad- or multicasting from Epoch Bells), corresponding to Section 7.2 in {{-rats-models}} | |||
| * solicited distribution (e.g., via a subscription to Epoch Bells), corresponding to Section 7.3 in {{-rats-models}} | |||
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| In all three interaction models, Epoch Markers can be used as content for the generic information element 'handle'. Handles are most useful to establish freshness in unsolicited and solicited distribution by the Epoch Bell. In ad-hoc requests, the handle is typically a nonce generated by the challenger. In consequence, a fresh Epoch Marker used as a handle in ad-hoc requests must be available to the challenger. While this strategy can provide additional capabilities to challenge-response attestation (e.g., limiting the number of ad-hoc requests by a Verifier), it can also be an overhead that can be avoided by using a nonce as the handle. | |||
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| In all three interaction models, Epoch Markers can be used as content for the generic information element 'handle'. Handles are most useful to establish freshness in unsolicited and solicited distribution by the Epoch Bell. In ad-hoc requests, the handle is typically a nonce generated by the challenger. In consequence, a fresh Epoch Marker used as a handle in ad-hoc requests must be available to the challenger. While this strategy can provide additional capabilities to challenge-response attestation (e.g., limiting the number of ad-hoc requests by a Verifier), it can also be an overhead that can be avoided by using a nonce as the handle. | |
| In all three interaction models, Epoch Markers can be used as content for the generic information element 'handle'. Handles are most useful to establish freshness in unsolicited and solicited distribution by the Epoch Bell. In ad-hoc requests, the handle is typically a nonce generated by the challenger. As a consequence, a fresh Epoch Marker used as a handle in ad-hoc requests must be available to the challenger. While this strategy can provide additional capabilities to challenge-response attestation (e.g., limiting the number of ad-hoc requests by a Verifier), it can also be an overhead that can be avoided by using a nonce as the handle. |
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addresses #23 (comment)