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4.2 Selecting FAL

NIST PIV and digital identity SP 800-217 (Draft)
All changes in this version
first version loaded 4 Federation Assurance Level (FAL) 788 part of 4

Title

Selecting FAL

Control

Agencies SHALL select the FAL appropriate for a given RP using the digital identity risk management process specified in [SP800-63] . Notwithstanding the results of that process specifying a higher assurance level, agencies SHOULD use federation protocols, architectures, and processes that are compliant with FAL2 or higher to maximize the assurance provided by the management of the PIV identity accounts.

When not practical to deploy federation at FAL2 in low-impact use cases, agencies MAY elect to use FAL1 technologies and processes, in accordance with their digital identity risk management process. In such cases, the risk assessment SHALL consider the potential impact of risks associated with the FAL1 mechanisms that will be used. This could include assertion injection attacks associated with front-channel presentation mechanisms or acceptance of outdated attributes associated with use of PIV IdPs that are not the subjects’ home agency IdPs.