RADIUS is the Remote Access Dial-In User Service, an Authorization, Authentication,
and Accounting (AAA) client-server protocol for when a AAA dial-up client logs in or out
of a Network Access Server. Typically, a RADIUS server is used by Internet Service
Providers (ISP) to performs AAA tasks. AAA phases are described as follows:
● Authentication phase: Verifies a user name and password against a local
database. After the credentials are verified, the authorization process begins.
● Authorization phase: Determines whether a request will be allowed access to a
resource. An IP address is assigned for the Dial-Up client.
● Accounting phase: Collects information on resource usage for the purpose of
trend analysis, auditing, session time billing, or cost allocation.
Wi-Fi Protected Access* (WPA)
Wi-Fi Protected Access (WPA) is a security enhancement that strongly increases the
level of data protection and access control to a WLAN. WPA mode enforces 802.1x
authentication and key-exchange and only works with dynamic encryption keys. To
strengthen data encryption, WPA utilizes its Temporal Key Integrity Protocol (TKIP).
TKIP provides important data encryption enhancements that include a per-packet key
mixing function, a message integrity check (MIC) named Michael an extended
initialization vector (IV) with sequencing rules, and a also re-keying mechanism. Using
these improvement enhancements, TKIP protects against WEP's known weaknesses.
PEAP
PEAP is a new Extensible Authentication Protocol (EAP) IEEE 802.1x authentication
type designed to take advantage of server-side EAP-Transport Layer Security (EAP-TLS)
and to support various authentication methods, including user's passwords and one-time
passwords, and Generic Token Cards.
Cisco LEAP
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