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Distributed Consistency in Identity Management is required when more than one process might be assigning identifiers that are required to be unique.
- Decentralized Consistency is an easier problem when each Registration Authority is given control of a portion of a name space where it can control registration.
- With the advent of fully distributed systems where any one machine could desire the ability to create an identifier, this problem needs a practical resolution.
- Coordination is tricky to implements and expensive in terms of latency added.
- Joseph Hellerstein and Peter Alvaro, Keeping CALM: When Distributed Consistency is Easy (2020-09) CACM 63 no 3 pp. 72ff