3.4.1.2 Pairwise Pseudonymous Identifier Generation

The PPI SHALL contain no identifying information about the subscriber (e.g., username, email address, employee number). The PPI SHALL be difficult to guess by a party with access to information about the subscriber and SHALL provide sufficient entropy as to be unguessable by an attacker. PPIs can be generated randomly and assigned to subscribers by the IdP or derived from other subscriber information if the derivation is done in an irreversible, unguessable manner (e.g., using a keyed hash function with a secret key, as discussed in [SP800-131A]).

Unless the PPI is designated as shared by the trust agreement, the PPI SHALL be disclosed to only a single RP.

1. Forbhreathnú

1.1 Tagairtí

1.2 Ceanglais aitheanta

1.3 Rialacháin ghaolmhara

2. Ceanglais aitheanta

3. Rialacháin ghaolmhara

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