first seen

Definition

"First seen" in KERI is the first verified event, accepted in the KEL. It has no effect on the timing of what has arrived in escrow for example; in escrow there can be garbage. Every 'first seen' event is propagated world wide within micro-seconds to the watchers. Only in this microseconds windows that you could have a live key compromise attack. If that happens, this where you have to look after this duplicity-attack a bit more in depth to handle it safely. E.g. a valid key rotation.

The rule

First seen, always seen, never unseen.
Everyone can have a different first-seen number.