CISSP Exam Note (Domain 1: Access Control) – Centralized & Decentralized, etc…

November 23, 2009 · Posted in Information Security, Information Systems · Comment 

Access Control – Centralized and Decentralized

Centralized Access Control – is a facility in which all the core functions for access such as Authentication, Authorization, and Accountability (AAA) are performed from a centralized location.

  • RADIUS – Remote Access Dial-In User Service (incorporates an AS and dynamic password)
  • TACACS – Terminal Access Controller Access Control System (for network applications, static pwd)
  • TACACS+ – Terminal Access Controller Access Control System Plus, supports token authentication

CHAP – Challenge Handshake Authentication Protocol

  • Supports encryption, protects password

Decentralized Access Control – generally require medium to large workgroups of individuals and carry higher administrative overhead accordingly. In a decentralized environment, maintaining a homogeny of equipment and services scales in increasing difficulty with proportion to the number of access control points. Changes effected on individual systems are spread locally, instead of having the wide-reaching consequences and effects of a singular centralized system. Read more

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