Quantitative timing is often explicitly used in systems for better security, e.g., the credentials for automatic website logon often has limited lifetime. Verifying timing relevant security protocols in these systems is very challenging as timing adds another dimension of complexity compared with the untimed protocol verification. In our previous work, we proposed an approach to check the corre...

This paper presents the study of network protocol in respect of security . . In this paper a study of various papers and articles is done, and in this paper we explain two central problems associated with the design and security analysis of network protocols that use cryptographic primitives. The main goal is to develop methods for proving properties of complex protocols by combining independen...

In mobile ad hoc networks, the absence ofinfrastructure and the consequent absence of authorizationfacilities impede the usual practice of establishing a practicalcriterion to distinguishing nodes as trusted and distrusted.Since all nodes in the MANETs would be used as router inmulti-hop applications, secure routing protocols have vital rulein the security of the network. So evaluating the perf...

Traditionally, verification methods for security protocols typically assume that the protocols are used in isolation of other protocols (i.e., there is only a single protocol using a network at a given time). However, in practice it is unrealistic to assume that a security protocol runs in isolation in an insecure network. A multi-protocol attack is an attack in which more than one protocol is ...

Security protocols are notoriously difficult to debug. One approach to the automatic verification of security protocols with a bounded set of agents uses logic programming with analysis and synthesis rules to describe how the attacker gains information and constructs new messages. We propose a generic approach to verifying security protocols in Spin. The dynamic process creation mechanism of Sp...

Model checking is an automatic verification technique to verify hardware and software systems. However it suffers from state-space explosion problem. In this paper we address this problem in the context of cryptographic protocols by proposing a security property-dependent heuristic. The heuristic weights the state space by exploiting the security formulae; the weights may then be used to explor...

The Actor Specification Diagram Language is a rigorously defined graphical specification language, with features for modelling concurrency and asynchronous communication. These features make the language appropriate for the formal analysis of distributed security protocols. The graphical nature of the language makes protocol descriptions easy to read and understand, vital properties for appeal ...

Specifications for security protocols range from informal narrations of message flows to formal assertions of protocol properties. This paper discusses those specifications, emphasizing authenticity and secrecy properties. It also suggests some gaps and some opportunities for further work. Some of them pertain to the traditional core of the field; others appear when we examine the context in wh...

Usage of the Internet has increased rapidly over the past decade. Increased amount of network users has also brought along a need of network-based services that require security. Developing new security protocols is a difficult task and sometimes too difficult task for human mind. We need an efficient tools to help the development and verification of the protocols. In this paper we introduce th...

It is often diicult to specify exactly what a security protocol is intended to achieve, and there are many example of attacks on protocol which have been proved to satisfy thèwrong', or too weak a speciica-tion. Contrary to the usual approach of attempting to capture what it is that protocol achieves in abstract terms, we propose a readily automatable style of speciication which simply asserts ...