SECURE ACCESS

• US 20100031334A1
• Filed: 11/02/2007
• Published: 02/04/2010
• Est. Priority Date: 11/29/2006
• Status: Active Grant

• Current Assignee: British Telecommunications PLC (BT Group PLC)
• Original Assignee: British Telecommunications PLC (BT Group PLC)
• Inventors: Shaikh, Imran
• Granted Patent: US 9,237,139 B2
• Time in Patent Office: Days
• US Class Current: 726/7
• CPC Class Codes: G06F 21/35 communicating wirelessly
• CPC Class Codes: G06F 21/43 wireless channels
• CPC Class Codes: G06F 2221/2151 Time stamp
• CPC Class Codes: G07C 9/27 with central registration
• CPC Class Codes: G07C 9/33 by means of a password
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/105 Multiple levels of security
• CPC Class Codes: H04L 63/107 wherein the security policies are location-dependent, e.g. entities privileges depend on current location or allowing specific operations only from locally connected terminals
• CPC Class Codes: H04W 12/084 using delegated authorisation, e.g. open authorisation [OAuth] protocol
• CPC Class Codes: H04W 48/04 based on user or terminal location or mobility data, e.g. moving direction, speed

Abstract

A system and method for controlling access to a protected network resource is provided. Access is controlled as follows. User credentials received with a request from a user for access to the protected network resource are checked against predetermined user information so as to authenticate the user; The request is made via a network access point located within a restricted area. The recorded location of the user is checked to determine whether the user is recorded as being within the restricted area. Access to the protected network resource is allowed if the user credentials are authenticated and the user is recorded as being within the restricted area. The user'"'"'s network connection is monitored and, on detection that the user is disconnected from the network, the user is recorded as not located within the restricted area. Additional credentials are required from the user to support the user'"'"'s request when the user is not recorded as being within the restricted area.

Claims

1. A method for controlling access to a protected network resource comprising the steps of:

receiving a request for access to the protected network resource and user credentials from a user connected to a network via a network access point located within a restricted area;

checking the user credentials against predetermined user information so as to authenticate the user;

checking whether the user is recorded as being within the restricted area;

allowing the user access to the protected network resource if the user credentials are authenticated and the user is recorded as being within the restricted area;

monitoring, the user'"'"'s network connection and on detection that the user is disconnected from the network, recording the user as not located within the restricted area.

2. A method as claimed in claim 1 including consulting an access control system for the restricted area as to whether the user is within the restricted area and recording the user'"'"'s location accordingly.

3. A method as claimed in claim 2 including, on detection that the user is disconnected from the network, overwriting the record of the user'"'"'s location to indicate that the user is no longer within the restricted area.

4. A method as claimed in claim 1 including establishing a database including information on the user'"'"'s location and network authentication status in which checking whether the user is recorded as being within the restricted area includes checking the database.

5. A method as claimed in claim 1 including comparing the time of the recorded entry into the restricted area with the time of the request and allowing the user access to the protected network resource if the request occurs within a set time period after the recorded entry.

6. A method as claimed in claim 1 including requiring additional credentials from the user to support the user'"'"'s request when the user is recorded as not being within the restricted area.

7. A method as claimed in claim 1 in which the restricted area access control system records the user as having entered the restricted area following a successful challenge, in which the challenge consists of at least one of:

verifying a physical security token; and

verifying security information provided by the user via a terminal.

8. A method as claimed in claim 1 including the steps of detecting that the user is disconnected, receiving a new request for access and allowing the user access to the protected network resource if the user is recorded as re-entering the restricted area.

9. A method as claimed in claim 1 in which the step of checking whether the user is recorded as being within the restricted area precedes checking the user credentials.

16. A computer program or suite of computer programs for use with one or more computers to perform the method steps as set out in claim 1.

10. An access controller for controlling access to a protected network resource

in which the access controller is arranged for connection to a network access point located within a restricted area;

in which the access controller is arranged to receive a request for access to the protected network resource and user credentials from a user connected to a network via the network access point;

in which the access controller is arranged to check the user credentials against predetermined user information so as to authenticate the user and to check information from a restricted area access control system as to whether the user is recorded as being within the restricted area;

in which the access controller is arranged to allow the user access to the protected network resource if the user credentials are authenticated and the user is recorded as being within the restricted area;

in which the access controller is arranged to monitor the user'"'"'s network connection and on detecting disconnection of the user from the network, the access controller is arranged to record the user as not located within the restricted area.

11. An access controller as claimed in claim 10 comprising means for accessing storage for storing user status information, in which the user status information comprises:

information from the restricted area access control system indicating that the user has registered their entry into the restricted area; and

information from an authentication system indicating that the credentials supplied by the user have been accepted in which the access controller is arranged to update, upon detecting disconnection of the user from the network, the information from the restricted area access control system to indicate that the user has left the restricted area.

12. An access controller as claimed in claim 10 which the information from the restricted area access control system indicating that the user has registered their entry into the restricted area derives from one of:

the user passing an access control point to enter the restricted area;

and the user communicating with the restricted area access control system via a terminal.

13. An access controller as claimed claim 10 arranged, upon determining that the user is recorded as not being within the restricted area, to require additional credentials from the user to support the user'"'"'s request.

14. An access controller as claimed in claim 10 arranged to record the time of the user'"'"'s entry into the restricted area and the time of the request and to allow the user access to the protected network resource if the request occurs within a set time period after the entry.

15. A computer network comprising the access controller of claim 10.