Subject: Re: [COSE] [cose-issues] Move “creation time” value to the payload (#13)

From: Jim Schaad <[email-masked]>
Date: Mon, 07 Dec 2015 10:02:07 -0800

The field name is changed from "creation time" to "operation time".  This better reflects what can actually be placed here, i.e. the time that the operation was performed.  This field is useful for things like countersignatures when one wants to make a timestamp.  This makes it something that should stay in the document.  The justification text has been updated to reflect that this is the primary intent of the field. 

However, as posited by Hannes, this field can also be used for replay detection as a time point is a reasonable thing to be looking at when determining if the context should be processed.  Placing it outside of the cryptographic text allows for checking the field before wasting time on the cryptographic operation.

cose-wg/cose-spec#106

---
Reply to this email directly or view it on GitHub:
https://github.com/cose-wg/cose-issues/issues/13#issuecomment-162609224