Even if a cryptographic system is eventually compromised or keys are revoked for reasons other than fraud, a long-lived or non-expiring verifiable claim with a PoE timestamp can still be valid provided that the claim existed sufficiently before the compromise or revocation. If the PoE timestamp is comprised that is another story, but today they largely are dome with modern hash algorithm's which look fairly strong (possibly over-engineered) and are even relatively quantum resistant. -- Christopher Allen [via iPhone]
Received on Monday, 18 September 2017 22:05:49 UTC