5.2 Reauthentication

The periodic reauthentication of sessions SHALL be performed to confirm the subscriber’s continued presence at an authenticated session (e.g., that the subscriber has not walked away without logging out).

Session management uses two types of timeouts. An overall timeout limits the duration of an authenticated session to a specific period following authentication or a previous reauthentication. An inactivity timeout terminates a session without activity from the subscriber for a specific period. For both types of timeouts, the RP MAY alert the subscriber that the session is about to be terminated and allow the subscriber to make the session active or reauthenticate as appropriate before the session expires. When either timeout expires, the session SHALL be terminated. Session activity SHALL reset the inactivity timeout, and successful reauthentication during a session SHALL reset both timeouts.

The overall and inactivity timeout expiration limits depend on several factors, including the AAL of the session, the environment in which the session is conducted (e.g., whether the subscriber is in a restricted area), the type of endpoint being used (e.g., mobile application, web-based), whether the endpoint is a managed device,¹ and the nature of the application itself. The limits MAY also be extended when higher security session maintenance technologies (e.g., device-bound mechanisms) are used. Agencies SHALL establish and document the inactivity and overall time limits being enforced in a system security plan, such as that described in [SP800-39]. Detailed requirements for each AAL are given in Sec. 2.1.3, Sec. 2.2.3, and Sec. 2.3.3.

Special considerations apply to session management and reauthentication when using a federation protocol and IdP to authenticate at the RP, as described in [SP800-63C]. The federation protocol communicates an authentication event at the IdP to the RP using an assertion, and the RP then begins an authenticated session based on the successful validation of this assertion. Since the IdP and RP manage sessions separately from each other and the federation protocol does not connect the session management between the IdP and RP, the termination of the subscriber’s sessions at an IdP and RP are independent of each other. Likewise, the subscriber’s sessions at multiple different RPs are established and terminated independently of each other.

Consequently, when an RP session expires and the RP requires reauthentication, it is possible that the session at the IdP has not expired and that a new assertion could be generated from this session at the IdP without explicitly reauthenticating the subscriber. The IdP can communicate the time and details of the authentication event to the RP, but the RP SHALL be authoritative as to whether the reauthentication requirements have been met. Section 4.7 of [SP800-63C] provides additional details and requirements for session management within a federation context.

1. Ħarsa ġenerali

1.1 Referenzi

1.2 Rekwiżiti identifikati

1.3 Regolamenti relatati

2. Rekwiżiti identifikati

3. Regolamenti relatati

• 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.