+2.3 Authentication Assurance Level 3
---+2.3.1 Permitted Authenticator Types
---+2.3.2 Authenticator and Verifier Requirements
---+2.3.3 Reauthentication

2.3 Authentication Assurance Level 3

AAL3 provides very high confidence that the claimant controls authenticators that are bound to the subscriber account. Authentication at AAL3 is based on the proof of possession of a key through the use of a cryptographic protocol along with either an activation factor or a password. AAL3 authentication requires the use of a cryptographic authenticator with a non-exportable private key that provides phishing resistance. Approved cryptographic techniques are required.

1. Přehled

2.3.1 Permitted Authenticator Types

AAL3 authentication SHALL require one of the following authenticator combinations:

Multi-factor cryptographic authentication (Sec. 3.1.7)
Single-factor cryptographic authentication (Sec. 3.1.6) used in conjunction with either a password (Sec. 3.1.1) or a biometric comparison

A biometric characteristic is not recognized as an authenticator by itself. Section 3.2.3 requires a physical authenticator to be authenticated along with the biometric comparison. The physical authenticator then serves as “something you have,” while the biometric match serves as “something you are.” When a biometric comparison is used as an activation factor for a multi-factor authenticator, the authenticator itself serves as the physical authenticator. As noted in that section, local verification of biometric factors (i.e., the use of a multi-factor authenticator with a biometric comparison as an activation factor) is preferred over central biometric factor comparison.
2.3.2 Authenticator and Verifier Requirements

Authenticators used at AAL3 SHALL use approved cryptography. Communication between the claimant and verifier SHALL occur via one or more authenticated protected channels. The cryptographic authenticator used at AAL3 SHALL have a non-exportable private key and SHALL provide phishing resistance, as described in Sec. 3.2.5. The cryptographic authentication protocol SHALL be replay-resistant, as described in Sec. 3.2.7. All authentication and reauthentication processes at AAL3 SHALL demonstrate authentication intent from at least one authenticator, as described in Sec. 3.2.8. Cryptographic authenticators used at AAL3 SHALL use public-key cryptography to protect the authentication secrets from compromise of the verifier.

Single-factor and multi-factor authenticators used at AAL3 SHALL be validated to meet the requirements of [FIPS140] Level 1 or higher overall. As described in Sec. 3.2.12, cryptographic authenticators used at AAL3 are required to provide a hardware-protected, isolated environment to prevent authentication keys from being leaked or extracted. Since syncable authenticators (described in Appendix B) require the private key to be exportable, syncable authenticators SHALL NOT be used at AAL3.

Cryptography used by verifiers at AAL3 SHALL be validated at [FIPS140] Level 1 or higher.

Hardware-based authenticators and verifiers at AAL3 SHOULD resist relevant side-channel (e.g., timing and power-consumption analysis) attacks.
2.3.3 Reauthentication

Periodic reauthentication of subscriber sessions SHALL be performed, as described in Sec. 5.2. At AAL3, the overall timeout for reauthentication SHALL be no more than 12 hours. The inactivity timeout SHOULD be no more than 15 minutes. Unlike AAL2, AAL3 reauthentication requirements are the same as for initial authentication at AAL3.

1.1 Odkazy

1.2 Identifikované požadavky

1.3 Související regulace

2. Identifikované požadavky

Požadavky

3. Související regulace

Regulace
  • NIST -

    EN: Publications of the National Institute of Standards and Technology (NIST), U.S. Department of Commerce, https://www.nist.gov/, from their electronic versions (OSCAL; SP 800-63-4 from its HTML version, https://pages.nist.gov/800-63-4/). Works of NIST employees are not subject to copyright protection in the United States (17 U.S.C. § 105); the OSCAL content is dedicated to the public domain worldwide (CC0 1.0); outside the United States NIST grants the right to reprint its technical series publications in all formats (NIST copyright statement). Republished courtesy of the National Institute of Standards and Technology; each document names its citation. Divided into sections and converted into the GRCA format, the wording unchanged. Only the versions published by NIST are authoritative.

    DE: Veröffentlichungen des National Institute of Standards and Technology (NIST), U.S. Department of Commerce, https://www.nist.gov/, aus ihren elektronischen Fassungen (OSCAL; SP 800-63-4 aus ihrer HTML-Fassung, https://pages.nist.gov/800-63-4/). Werke von NIST-Beschäftigten sind in den USA urheberrechtlich nicht geschützt (17 U.S.C. § 105); die OSCAL-Inhalte sind weltweit gemeinfrei gestellt (CC0 1.0); außerhalb der USA räumt das NIST das Recht ein, seine Technical-Series-Publikationen in allen Formaten neu zu veröffentlichen (Copyright-Hinweis des NIST). „Republished courtesy of the National Institute of Standards and Technology“; jedes Dokument nennt seine Zitierangabe. In Abschnitte aufgeteilt und in das GRCA-Format umgewandelt, der Wortlaut unverändert. Maßgeblich sind allein die vom NIST veröffentlichten Fassungen.