WSN is utilized in various areas – science, medicine, military and commerce – with its strengths over the convenience and application of the existing network. However, due to physical restrictions of objects comprising of WSN, a security system considering WSN traits is required.Vulnerabilities lie in key generation method and impersonation attacks by attackers transmitting object data unencrypted via an public channel in user authentication and key agreement Method by Chen et al.. The thesis ensured untraceability and anonymity of users and suggested session key generation via key agreement technique for all users and sensor nodes, improving the problems in the method by Chen et al. User authentication and key agreement by Chen et al. is a method to apply key agreement method to sensor nodes and to receive the key from Gateway. Hence, if the message transferred to users is captured by attackers, session key is exposed. Accordingly, the thesis improved the key generation into key agreement method for all sensor nodes and users and prevented session key from exposure to attackers. Moreover, the unencrypted user ID being transferred via an public channel is reformed. User ID is transformed into a secret key shared among users and Gateway, thus user ID becomes unidentifiable without the shared secret key even if attackers captures the message. Lastly, mutual authentication process is added to enable authentication among transmitter-receiver objects and the objects has become available for mutual certification. Gateway at login stage can identify the generator of the message received is a user and the sensor nodes can identify the message sent is Gateway.All objects using session key are improved to adapt key agreement method from the existing method, and problems in user anonymity is reformed to enable responses against attacks, recognizing connectivity between sessions, committed by attackers who captured the messages successively transferred. In addition, mutual authentication has enabled responses against impersonation attacks.
Volume 11 | 08-Special Issue
Pages: 2013-2018