Research Article
Security Enhancement Using Cache Based Reauthentication in WiMAX Based E-Learning System
Algorithm 1
Proposed Cache Based EAP Authentication Algorithm.
| CEAP Authentication | | Precondition: Every user transfers timestamp and nonce along with its identity in the request message. | | Input: , , SKID | | Output: SK, SKnew, TEK | | Begin | | (1) While all users are authenticated | | (2) If initial authentication request //new user request | | (3) If == and == //user verification | | Forward the session key SK, AuK, TEK to use | | If free cache block //cache the session at ASN | | Store the SK, SKID, SKS, ,T in cache | | If no cache block | | Send Replace (, SKSA, SID, , , ) to | | End If | | End If | | (4) If re-authentication request //existing user requesting re-authentication | | (5) Compute the SKI | | (6) If SKID == SKI //cached user verification | | If SID in AT and count ≤ 6 //not a expired session | | Forward new session key to user | | Update T and count | | (7) If invalid user request | | Got to step (3) //perform full authentication | | End If | | End If | | End If | | End |
|
