Otway–Rees protocol

About: Otway–Rees protocol is a research topic. Over the lifetime, 1975 publications have been published within this topic receiving 40569 citations.

Method for dynamically tunneling over an unreliable protocol or a reliable protocol, based on network conditions

Abstract: A method, and computer program product for providing dynamically tunneling over an unreliable protocol or a reliable protocol based on network conditions is presented A connection between a source device and a destination device is established using a reliable protocol An attempt is then made to utilize an unreliable protocol to communicate between the source device and the destination device When the attempt to utilize an unreliable protocol is successful, then the unreliable protocol is used to transmit data between the source device and the destination device When the attempt to utilize the unreliable protocol is unsuccessful, then the reliable protocol connection is used to transmit data between the source device and the destination device

Authenticated Modbus Protocol for Critical Infrastructure Protection

Abstract: Protecting a nation's critical infrastructure, notably its power grid is crucial in view of increasing threats, such as international terrorism. We focus on the security of the Modbus protocol, a de-facto protocol for distributed control systems popularly used for power plants. Specifically, we analyze the security of a recently proposed authenticated Modbus protocol. We present attacks on the protocol, discuss reasons behind these phenomena, and motivate how these problems can be addressed.

Simulation and cost analysis of group authentication protocols

Abstract: Radio Frequency Identification (RFID) is an efficient technology for identification, tracking and group proof construction. The multi-round protocols for authentication and group proof construction increase the cost with increase in participants. In this work, computational and communication cost of multi-round protocol is calculated to identify the protocol with least cost and high security. The computational cost is computed using number of rounds and messages, Message Authentication Code (MACO) operations, messages sent per participant and messages received per participant. The communication cost is computed using size of message sent and size of message received. In order to reduce the computational and communication cost, two lightweight group authentication protocols are selected for refinement. The protocols are: Juel's protocol, and Saito and Sakurai protocol. Three refinements are proposed which convert these protocols from two-party group construction to n-party group construction. Results show that refinements reduce the cost compared to Juel's protocol and Saito and Sakurai's protocol. It is observed that high security in group proof construction is still infeasible, thus if security is required to be maximum then multi-round protocol should be preferred. In this work, a multi-round authentication protocol of [1] is analyzed for comparative security analysis. Simulation analysis shows that performance of proposed authentication protocol in multi-round category as well as single-round category is better than state-of-art protocols.

Hybrid key establishment for multiphase self-organized sensor networks

Abstract: Recent work on key establishment for sensor networks has shown that it is feasible to employ limited elliptic curve cryptography in sensor networks through hybrid protocols. We propose a hybrid key establishment protocol for uniform self-organized sensor networks. The proposed protocol combines elliptic curve Diffie-Hellmann key establishment with implicit certificates and symmetric-key cryptographic techniques. The protocol can be implemented on uniform networks comprised of restricted functional devices. Furthermore, due to its public-key nature, the protocol is resilient to a wide range of passive and active attacks, such as known-key attacks, as well as attacks against the confidentiality, integrity and authenticity of the communication. The protocol is scalable and efficient for low-capability devices in terms of storage, communication and computational complexity; the cost per node for a key establishment is reduced to one scalar multiplication with a random point, plus one with a fixed point.