For purposes of security analysis, cryptographic protocols can be translated from a high-level message-list language like CAPSL into a multiset rewriting (MSR) rule language like CIL. The natural translation creates two rules per message or computational action. We show how to optimize the natural rule set by about 50% into a form similar to the result of hand encoding, and prove that the transformation is sound because it is attack-preserving, and unique because it is terminating and confluent. The optimization has been implemented in Java.0-7695-0671-2/00 $10.00 ã 2000 IEEE

In this paper, we present a set of software tools for developing and validating object oriented conceptual models specified in TROLL. TROLL is a formal object-oriented language for modelling information systems on a high level of abstraction. The tools include editors, syntax and consistency checkers as well as an animator which generates executable prototypes from the models on the same level of abstraction. In this way, the model behaviour can be observed and checked against the informal user requirements. After a short introduction in some validation techniques and research questions, we describe briefly the TROLL language as well as its graphical version OMTROLL. We then explain the system architecture and show its functionalities by a simplified example of an industrial application which is called CATC (Computer Aided Testing and Certifying).

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Se analiza con detalle el posicionamiento de las bibliotecas públicas de la Región de Murcia en internet, así como las principales características de sus webs. (a)