- From: David Chadwick <d.w.chadwick@kent.ac.uk>
- Date: Sat, 21 May 2016 19:44:38 +0100
- To: public-credentials@w3.org
On 21/05/2016 12:56, Victoriano Giralt wrote: > On 20/05/16 22:35, David Chadwick wrote: >>> what is an example of a credential that's irrevocable? >> >> Any short lived one, where the time/overhead of revocation is comparable >> with the lifetime > > Stupid question: wouldn't a birth certificate be an irrevocable > credential? It is a fact of life that any person is born, you can (and > will) die, but your birth a fact that existed in a given point in time. > You are mixing up the attribute/claim, date of birth (or similar) which lasts forever, and the credential, which is a cryptographic digital representation of it. This has to have an expiry time due to the inherent weakness of the crypto. regards David
Received on Saturday, 21 May 2016 18:45:11 UTC