SYSTEM AND METHOD FOR PROVIDING SECURITY IN MOBILE WiMAX NETWORK SYSTEM

Abstract

A method for providing security between a radio access station and an access control router in a mobile microwave access network includes: receiving, by the radio access station and the access control router, the same certificate from a licensed certification authority; generating, by the access control router, an access service network traffic encryption key (asn_TEK); encrypting, by the access control router, a message to be transmitted with the generated asn_TEK and transmitting the encrypted message to the radio access station; verifying, by the radio access station, the certificate of the licensed certification authority appended to the message received from the access control router to check the asn_TEK, and decrypting the message received from the access control router to obtain an actual message; encrypting, by the radio access station, the actual message with the checked asn_TEK and transmitting the encrypted message to the access control router.

What is claimed is: 
     
         1 . A method for providing security between a radio access station and an access control
 router in a mobile Worldwide Interoperability for Microwave Access (WiMAX) network system, the method comprising the steps of:   receiving, by the radio access station and the access control router, the same certificate from a licensed certification authority;   generating, by the access control router, an Access Service Network Traffic Encryption Key (asn_TEK);   encrypting, by the access control router, a message to be transmitted with the generated Access Service Network Traffic Encryption Key (asn_TEK) and transmitting the encrypted message to the radio access station;   verifying, by the radio access station, the certificate of the licensed certification authority appended to the message received from the access control router to check the Access Service Network Traffic Encryption Key (asn_TEK), and decrypting the message received from the access control router to obtain an actual message; and   encrypting, by the radio access station, the actual message with the checked Access Service Network Traffic Encryption Key (asn_TEK) and transmitting the encrypted message to the access control router.   
     
     
         2 . The method of  claim 1 , comprised of the Access Service Network Traffic Encryption Key (asn_TEK) comprising a timestamp. 
     
     
         3 . The method of  claim 1 , comprised of the Access Service Network Traffic Encryption Key (asn_TEK) being encrypted with a public key, and comprising the certificate of the licensed certification authority and a timestamp. 
     
     
         4 . A method for providing security between an access control router and an Authentication, Authorization, and Accounting (AAA) server in a mobile Worldwide Interoperability for Microwave Access (WiMAX) network system, the method comprising the steps of:
 receiving, by the access control router and the Authentication, Authorization, and Accounting (AAA) server, the same certificate from a licensed certification authority;   generating, by the access control router, an Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK);   encrypting, by the access control router, a message to be transmitted with the generated   Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK) and transmitting the encrypted message to the Authentication, Authorization, and Accounting (AAA) server;   verifying, by the Authentication, Authorization, and Accounting (AAA) server, the certificate of the licensed certification authority appended to the message received from the access control router to check the Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK), and decrypting message received from the access control router to obtain an actual message; and   encrypting, by the Authentication, Authorization, and Accounting (AAA) server, the actual message with the checked Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK) and transmitting the encrypted message to the access control router.   
     
     
         5 . The method of  claim 4 , comprised of the Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK) comprising a timestamp. 
     
     
         6 . The method of  claim 4 , comprised of the Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK) being encrypted with a public key and comprising the certificate of the licensed certification authority and a timestamp. 
     
     
         7 . A method for providing security between an access control router and an Authentication, Authorization, and Accounting (AAA) server in a mobile Worldwide Interoperability for Microwave Access (WiMAX) network system, the method comprising the steps of:
 receiving, by the access control router and the Authentication, Authorization, and Accounting (AAA) server, the same certificate from a licensed certification authority;   generating, by the Authentication, Authorization, and Accounting (AAA) server, an Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK);   encrypting, by the Authentication, Authorization, and Accounting (AAA) server, a to message to be transmitted with the generated Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK) and transmitting the encrypted message to the access control router;   verifying, by the access control router, the certificate of the licensed certification authority appended to the message received from the Authentication, Authorization, and Accounting (AAA) server to check the Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK), and decrypting the message received from the Authentication, Authorization, and   Accounting (AAA) server to obtain an actual message; and   encrypting, by the access control router, the obtained actual message with the checked Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK) and transmitting the encrypted message to the Authentication, Authorization, and Accounting (AAA) server.   
     
     
         8 . The method of  claim 7 , comprised of the Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK) comprising a timestamp. 
     
     
         9 . The method of  claim 7 , comprised of the Access Service Network Connectivity Service Network Traffic Encryption Key (asn-csn-TEK) being encrypted with a public key and comprising the certificate of the licensed certification authority and a timestamp.