1,720,981 research outputs found
Security of internet routing
No full textIn this dissertation, we first study various cryptography algorithm and Internet routing, which include RIP protocol and issues related to security of the RIP network. Secondly, we survey the security vulnerabilities and threats of RIP routing protocols. Thirdly, we discuss about the related works proposed for securing the Internet routing. (Asst. Professor Tan Chik How)Master of Science (Communication Software and Networks
Security of internet routing
No full textIn this dissertation, we first study various cryptography algorithm and Internet routing, which include RIP protocol and issues related to security of the RIP network. Secondly, we survey the security vulnerabilities and threats of RIP routing protocols. Thirdly, we discuss about the related works proposed for securing the Internet routing. (Asst. Professor Tan Chik How)Master of Science (Communication Software and Networks
Secure multicast communications
No full textThe basic aim of this thesis is to survey the concept of multicasting and security issues surrounding multicast. It provides insights into the issues related to IP multicast security and to the possible directions of future developments. Three main areas were identified and discussed, namely multicast key management, multicast data authentication, and multicast security policies.Master of Science (Communication Software and Networks
Bluetooth security
No full textIn this thesis, we first present key system features of Bluetooth. Then we discuss Bluetooth security that focus on the key management, authentication and encryption.Master of Science (Communication Software and Networks
Performance of analysis of SSL
No full textIn this dissertation, the architecture of SSL protocol is presented, and the details of the handshake protocol are summarized and described in a sequence diagram that is simple and useful for the performance evaluation of SSL protocol.Master of Science (Communication Software and Networks
Security in voice over IP
No full textThis dissertation is the product of a research project3, which focuses on the study of VoIP protocols' security issues. It starts with the review of the three VoIP protocols. Then, it introduces some common security concepts used in VoIP security. After that, the dissertation concentrates on the study of SIP security. The build-in security mechanisms of SIP protocol are investigated. Two general security solutions for SIP protocol, that is, PGP/MIME and S/MIME, based on Public Key Infrastructure (PKI), are reviewed and analyzed. We further point out their advantages and disadvantages for SIP security. In order to overcome the disadvantages of these two solutions, a new solution for SIP security is proposed. The new solution makes use of the One-Time Password (OTP) scheme on the application layer and the TLS scheme on the transport layer. It can provide both access control service for call participants and authentication/confidentiality service for SIP messages.Master of Science (Communication Software and Networks
Key establishment protocols in mobile communication
No full textA variety of authenticated key establishment protocols for mobile applications had been proposed in recent years. One of the purposes of this research project is to examine and analyze some of the more prominent published authenticated key establishment protocols with regards to security and efficiency. In this research project, a number of goals pertaining to security in authentication process are identified and the authenticated key establishment protocols are then evaluated using these goals. In addition, the authenticated key establishment protocols are also simulated using known cryptosystems such as RSA and AES. Data from these simulations are then used to compare the efficiency of the various protocols. The authenticated key establishment protocols are then compared and further analyzed, particularly with regards to mobile efficiency. Generally, the more secured a key establishment protocol is, the more computational complex it is.Master of Science (Communication Software and Networks
Group key management for wireless networks
No full textWith the advancement of wireless networks in recent years, group communication via wireless networks is becoming an increasingly popular research area due to the growth of group oriented applications such as video conferencing, pay-per-view media distribution, real-time information services and collaborative work in wireless networks. Besides civilian applications mentioned above, group-oriented applications and protocols are also used widely in military operations. However, group communication via wireless networks takes place over radio waves, the common mode of communication in wireless networks, causes major security concern as radio transmission can be easily eavesdropped. Solutions such
as IPSec that provides end-to-end secure communications between two communicating parties and user nodes would require many different secret keys to communicate with every other node in the network. A better solution is to use a shared secret group key for secure group communications in a wireless network. To achieve this, the nodes in the wireless network will first run a group key management (GKM) protocol to establish a common group key. This key will then be used as a secret key for symmetric-key cryptography to encrypt messages that they wish to broadcast to the wireless network. In this way, entities outside the wireless network will not be able to decode these messages.DOCTOR OF PHILOSOPHY (EEE
Fast encryption for multimedia
No full textIn many multimedia applications, such as pay-TV, there are often conflicts between high security and efficiency. Application developers need secure multimedia data with encryption. They also need fast encryption because multimedia applications often serve high-bandwidth channels, and the computing device is needed to do other useful tasks apart from encryption.Master of Science (Communication Software and Networks
Electronic cash analysis on fair traceability, double spending prevention and model simplification
No full textElectronic cash is an electronic payment system which enables secure payment transactions without revealing customers' identity. This thesis starts with an overview of the concepts related to electronic payment, especially electronic cash, discussing its transactions and state-of-the-art techniques. Then, after an overview of electronic cash, I will analyze several electronic cash schemes against potential attacks. In this thesis, I will propose O-Cash, the fair traceable electronic cash in wallet with observers, which supports coin tracing and owner tracing as well as self-deanonymization. This scheme achieves prior restraint of double-spending using observers, detection of double-spender's identity using cryptographic methods in case observers are broken, and fair tracing in case crimes take place. Then, I will further propose a new electronic cash model SignCash, where electronic coins are generated by customers instead of banks. This model offers unique tradeoff between credit card systems and conventional off-line electronic cash systems, and provides anonymity to customers and higher security level than credit card systems. In addition, it enables customers to generate electronic coins which are authorized by the bank, and is more convenient for customers to use. Last but not least, I will compare the proposed electronic cash system with VisaCash and eNETS, and discuss the implementation aspects.MASTER OF ENGINEERING (EEE
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