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RadSec is a protocol for transporting RADIUS datagrams over TCP and TLS. The RADIUS protocol is a widely deployed authentication and authorization protocol. The supplementary RADIUS Accounting specification [1] also provides accounting mechanisms, thus delivering a full AAA protocol solution. However, RADIUS has two substantial shortcomings.
The H-AAA is similar to the HLR in voice. The H-AAA stores user profile information, responds to authentication requests, and collects accounting information. Visited AAA (V-AAA): The AAA server in the visited network from which a roamer is receiving service. The V-AAA in the serving network communicates with the H-AAA in a roamer's home network.
Remote Authentication Dial In User Service (RADIUS) June 2000: RADIUS: Updated by RFC 2868, RFC 3575, RFC 5080: This standard describes RADIUS authentication and authorization between a Network Access Server (NAS) and a shared RADIUS authentication server. This protocol is also used to carry configuration information from the RADIUS server to ...
Internet Authentication Service in the Microsoft Windows 2000 Resource Kit; Article describing how to log IAS (RADIUS) + DHCP to SQL; Configure IAS RADIUS for secure 802.1x wireless LAN at archive.today (archived 2012-12-06) How to self-sign a RADIUS server for secure PEAP or EAP-TTLS authentication at archive.today (archived 2012-12-05)
Also: Like RADIUS, it is intended to work in both local and roaming AAA situations. It uses TCP or SCTP, unlike RADIUS which uses UDP. Unlike RADIUS it includes no encryption but can be protected by transport-level security (IPSEC or TLS). The base size of the AV identifier is 32 bit unlike RADIUS which uses 8 bit as the base AV identifier size.
Two-factor or multi-factor authentication requires bank customers to prove their identity when logging in to accounts by providing at least two pieces of authenticating information.
For authentication by smart-clients, Appendix D defines the Smart Client to Access Gateway Interface Protocol, which is an XML-based protocol for authentication. Smart-client software (and devices that use it) use this so-called WISPr XML to seamlessly login to HotSpots without the need for the user to interact with a captive portal.
The MD5-based obfuscation method is similar to that used for the RADIUS User-Password attribute (RFC 2865 Section 5.2), and therefore has similar security properties. Another difference is that TACACS+ is used only for administrator access to networking equipment, while RADIUS is most often used for end-user authentication.