What does AAL stand for in authentication?

A measure of the strength of an authentication mechanism and, therefore, the confidence in it, as defined in [NIST SP 800-63-3] in terms of three levels: AAL1 (Some confidence), AAL2 (High confidence), AAL3 (Very high confidence). A category describing the strength of the authentication process.

What is the ACC of AAL and AAL2?

The ACC of AAL and AAL2 is a large region that includes the subgenual cingulate cortex area 25, and also pregenual and supracallosal components that appear to have different functions ( Grabenhorst and Rolls, 2011; Rolls, 2014, 2019b, c ).

What Authenticators are used at AAL1?

AAL1 permits single-factor authentication using a wide variety of authenticators listed in SP 800-63B Section 4.1.1. By far the most common authenticator at AAL1 is the memorized secret, but from the standpoint of meeting AAL1 requirements it is equally acceptable to use a physical authenticator such as an OTP device.

How many parcellations are there in AAL3?

The original numbering in AAL2 for the anterior cingulate cortex (35, 36) and thalamus (81, 82) is left empty in AAL3 because finer parcellations of these regions are provided in AAL3. Thus, the total number of parcellations in AAL3 is 166, with the maximum label number 170.