Clarifications of KeyUpdate and Exporter #278 #310
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This is very wrong
This overwriting is also very wrong. Not sure that the changes in this PR are worth making now when these paragraphs need a complete rewrite..... |
emanjon
reviewed
Jun 30, 2022
| @@ -789,7 +789,7 @@ PRK_exporter = EDHOC-KDF( PRK_out, 10, h'', hash_length ) | |||
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| where hash_length denotes the output size in bytes of the EDHOC hash algorithm of the selected cipher suite. | |||
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| PRK_exporter MUST be derived anew from PRK_out if EDHOC-KeyUpdate is used, see {{keyupdate}}. | |||
| PRK_exporter MUST be derived anew from PRK_out if EDHOC-KeyUpdate is used, see {{keyupdate}}. A typical mode of operation of an application is that PRK_exporter is derived from PRK_out generated by EDHOC, and application keys in turn from PRK_exporter. Later, when key update is required by the application, PRK_out is updated from which new PRK_exporter and application keys are derived. | |||
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"A typical mode of operation of an application is that PRK_exporter is derived from PRK_out generated by EDHOC, and application keys in turn from PRK_exporter."
Isn't this always the case?
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Replaced by #314 |
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