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3.4.1 Pairwise Pseudonymous Identifiers (PPI)

NIST PIV and digital identity SP 800-63C-4 against SP 800-63C
All changes in this version
added 3 Common Federation Requirements part of 3.4

Title changed

Before · SP 800-63C

After · SP 800-63C-4

Pairwise Pseudonymous Identifiers (PPI)

Control changed

Before · SP 800-63C

After · SP 800-63C-4

In some circumstances, it is desirable to prevent the subscriber account from being easily linked at multiple RPs through the use of a common subject identifier. A pairwise pseudonymous identifier (PPI) allows an IdP to provide multiple distinct federated identifiers to different RPs for a single subscriber account. The use of a PPI prevents different RPs from colluding to track the subscriber using the federated identifier.