Service Communautaire d'Information sur la Recherche et le Développement - CORDIS


PISA Résumé de rapport

Project ID: IST-2000-26038
Financé au titre de: FP5-IST
Pays: Netherlands

TUDelft privacy crypto

The people at Delft University of Technology were mainly involved in the PISA-project for the research on the cryptographic aspects of providing privacy in agent systems. A comprehensive list of possible threats to agents and their users was set up. Using this list, security requirements to agent technology could be given. Several solutions have been proposed to enhance the level of security and privacy in agent systems. All of them take the underlying threat of an untrustworthy host into account.

A new method was proposed for confidential agent communication, such that even the underlying platform is not capable of eavesdropping the communication. When privacy is required, e.g. when personal data is exchanged, this is important. Furthermore, a new agent digital signature was developed, such that the agent can sign a document without anybody having access to the private key. This is especially important in an agent environment, as the platform is in general capable of obtaining the agent’s private key during the signing operation. This private key is often used to prove the agent’s identity, therefore when providing privacy is a strong requirement, it is necessary that the agent’s private key is protected. Software agents execute tasks at locations that are not known beforehand; therefore it is necessary that these tasks are protected. A simple practical approach was suggested to encrypt these tasks.

In addition to practical solutions, Deflt University of Technology developed a theoretical model for mobile code. The model is based on the information theoretic approach as was first developed by Shannon, but was extended such that it is also applicable to mobile code. New theoretical limits could therefore be derived, such that the maximum level of secrecy is defined for mobile code.

Articles have been written and published on most of the results.


Jan C.a. LUBBE VAN DER, (Associate Professor, Faculty Electrical Engineering, Mathema)
Tél.: +31-15-2783878
Fax: +31-15-2781843