Importance

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Abstract

A method is provided of authenticating a user device requesting access to a computer system. The method includes encrypting current session data at a connection application of the user device via which a user requests access to the computer system, the current session data changing with each user request. The encrypted current session data is then included in user authentication data in an access request which is communicated in plain text which is then decrypted. Reference session data is then compared with the decrypted current session data and the user request is selectively categorized dependent upon the outcome of the comparison. The encrypted session data is provided in a format suitable for communication using a protocol from one of Point-to-Point Protocol (PPP), Password Authentication Protocol (PAP), Challenge-Handshake Authentication Protocol (CHAP), Remote Authentication Dial In User Service (RADIUS) protocol, Terminal Access Controller Access Control System (TACACS) protocol, Lightweight Directory Access Protocol (LDAP), NT Domain authentication protocol, Unix password authentication protocol, HyperText Transfer Protocol (HTTP), HyperText Transfer Protocol over Secure sockets layer (HTTPS), Extended Authentication Protocol (EAP), Transport Layer Security (TLS) protocol, Token Ring protocol and Secure Remote Password protocol (SRP).

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First Claim