Abstract
With regard to the widely used network and computer technology, the data transmission over the Internet suffers from the eavesdropping, illegal duplication, malicious forgery, etc. Thus, how to prove the integrity and confirm the authentication of the transmitted messages becomes the main challenge of a network system design. Obviously, more critical security criteria have to be adopted to construct a network system, for instance, authentication scheme, digital signature, electronic payment and data hiding, etc. In this study, we focus on the following subjects: authentication for wireless sensor networks (WSNs) and Session Initiation Protocol (SIP) and data hiding technologies for digital multimedia. First, we propose a secure Elliptic Curve Cryptography (ECC)-based authentication mechanism for wireless sensor networks and and Session Initiation Protocol. Specifically, authentication is becoming increasingly crucial because it accesses the server when a user asks to use the networks. Proper user identification for remote user authentication over insecure communication channels is increasingly essential. To sum up, our proposed protocol inherits the merits of ECC-based mechanism, and enhances authentication with higher security than the referenced scheme. The security of the proposed protocol in the authentication scheme is strengthened. Then, we propose two types of data hiding technologies for digital multimedia. Recently, there are many information applications in our daily lives, such as digital multimedia, electronic commerce, database, and so on. Specifically, digital multimedia has gained popularity for various types of information applications. To enhance the ownership protection, content authentication and secret sharing, the data hiding technique is proposed to solve this problem. The secret message can be extracted to prove the ownership or to verify the content integrity or to secretly transmit the message. By using this technique, the secret can be transmitted safely with incurring the suspicious by the unauthorized users.