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7.1.8 CAK + BIO(-A) Authentication

NIST PIV and digital identity SP 800-116
All changes in this version
first version loaded 7 PIV Authentication Mechanisms part of 7.1

Title

CAK + BIO(-A) Authentication

Control

As discussed in Section 7.1.6 and 7.1.7, BIO(-A) by itself does not provide three-factor authentication. However, when BIO(-A) and CAK authentication mechanisms are performed at the same time, the verification of the PIN can be trusted because the PIV Card is authenticated by CAK. CAK + BIO(-A) is listed in Table 7-1 because the combined authentication mechanism is judged to achieve three-factor authentication (which would not be predicted by the sum of the HKA vectors of CAK + BIO(-A)). 9