We consider the probabilistic contract signing protocol of Ben-Or, Goldreich, Micali, and Rivest as a case study in formal verification of probabilistic security protocols. Using the probabilistic model checker PRISM, we analyse the probabilistic fairness guarantees the protocol is intended to provide. Our study demonstrates the difficulty of combining fairness with timeliness in the context of...

under article 267 of the civil code, a person who pays the debt of the other without his permission cannot recover the amount paid as the payment of debt in this situation appears to be gratuitous. nevertheless, in different codes, the legislator has permitted a third party to pay the debts of the others in some situations.. by carefully examining these cases, it can be said that anytime the th...

one of the non- judicial enforcements which is addressed by some legal systems in order to preserving rights of a contracting party against breach of obligation of other party, is the right for sale of goods in self-help type by the damaged party .this enforcements was predicted and addressed in both vienna convention for international sale of goods and iranian legal system. but it is still unk...

Research to improve component reuse has focused on providing the specification of various behavior properties. In this paper we present our approach to this problem, which focuses not so much on specifying the behavior of the component, but instead on certain architectural constraints. We introduce our research project “lips”, a language for formally capturing these usage constraints and a tool...

The Traveling Tournament Problem (TTP) is an optimization problem that represents some types of sports timetabling, where the objective is to minimize the total distance traveled by the teams. This work proposes the use of a hybrid heuristic to solve the mirrored TTP (mTTP), called Clustering Search (*CS), that consists in detecting supposed promising search areas based on clustering. The valid...

This paper presents a trade-off design and optimization of a class of wireless carrier-sense multiple access protocols where collision-free transmissions are assisted by the potential cooperative retransmissions of inactive terminals with a correct copy of the original transmission. Terminals are enabled with a decode-and-forward relaying protocol. The analysis is focused on asymmetrical settin...

We present a runtime verification framework for Java programs. Properties can be specified in Linear-time Temporal Logic (LTL) over AspectJ pointcuts. These properties are checked during program-execution by an automaton-based approach where transitions are triggered through aspects. No Java source code is necessary since AspectJ works on the bytecode level, thus even allowing instrumentation o...