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DID-URL uniqueness across time #37
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Thanks @kdenhartog for this very interesting question, there are several considerations here that have to do with fundamental web architecture:
Happy to discuss further pros and cons of these different approaches. |
Interesting points that are brought up here. It seems every suggestion would handle the concern that originally brought this to my attention (DIDComm including a DID-url to a specific key). My preference would be toward the key hashing method or the version-time method. In my initial opinion version time would be preferred because it could specifically reference to a block on chain or to a time which would make did resolution easier I would think. I'll need to speak with some people/read more about the other ideas to see if this opinion holds after exploring the other ideas more. Thanks for posting this. |
While discussing with @peacekeeper DID-urls as a mechanism to refer to a key in a DID Document we came across an interesting question. Does a DID URL need to be unique across the entire history of the document?
In many cases this would be a helpful aspect to support for DIDComms. Particularly what this would help avoid is if a message was encrypted with DID#key1 at epoch 1, then it could be uniquely identified for the lifetime of the DID Document. This means that if DID#key1 were rotated to DID#key2 at epoch 2, then at epoch 3 DID#key1 or DID#key2 could be dereferenced.
The alternative to this would be that DID#key2 overrides DID#key1 at epoch 2. Then when dereferencing the key at Epoch 3 a time must also be specified.
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