Recent trends in the field of Artificial Intelligence, brought along new ways of formalizing and expressing wills and declarations. Its application to Virtual Enterprises requires an analysis of the interactions among agents, frameworks and users, as well as technical and legal analysis, in order to discover the rules to be applied, to solve a particular problem under a prospective scenario. Credibility, trust and security issues must be taken under consideration, especially concerning authenticity, confidentiality, integrity and nonrepudiation. In order to increase the use of agents in Virtual Enterprises

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The special nature of the characteristics used in biometric systems can present privacy challenges that might not arise with traditional identification methods, such as paper documents, because these data are derived from an individual's physical or behavioural features on the basis of a specific procedure, which is partly automated and yields a (reference) template. On account of their nature, these data require special precautions and the respect of the principles related with privacy and data protection.

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