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watcher
Henk van Cann edited this page Nov 8, 2024
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an instance of a KEL for an AID in which at least one event is unique between two instances of the KEL.
Source: Dr. S.Smith
KERI alternative to total global ordering and consensus protocols is a mechanism called duplicity detection. In the verification and validation watchers are all that matter; they guarantee that logs are immutable by one very simple rule: "first seen wins".
This would be a set of watchers (that the validators trust) that record any and all copies of key event logs (KEL) that they see. Because these watchers can be anyone and anywhere, any controller of a public identifier is at peril should they choose to publish inconsistent copies of their KEL. This removes the incentive to be duplicitous.