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Abstract: . . . hand, we would like to convey to the reader that the current state of security and privacy in net-based services is unsatisfactory. At this point, most services run on the basis of the trust. While there may often be good reasons to trust the service provider, this may not always be the case. Sabotage, insider break-ins, technical incompetence, or changes of ownership may occur even with service providers that are well-known and have a spotless reputation. Customers . . . . . . Signatures and Public- key Cryptosystems. In Communications of the ACM 21,2; 1978 17. Sander, T. und Tschudin, C., On Software Protection Via Function Hiding, Proceedings of the Second Workshop on Information Hiding, Springer Lecture Notes in Computer Science, 1998 18. Schurig, S., Geheimhaltung in Statistischen Datenbanken , Shaker, 1998 19. Smith, S.W., Weingart, S.H., Building a High-Performance, Programmable Secure Coprocessor. In Computer Networks, . . . . . . Trust is not enough: Privacy and Security in ASP and Web Service Environments Claus Boyens 1 and Oliver Gnther Institute of Information Systems Humboldt-Universitt zu Berlin Spandauer Str. 1, 10178 . . . . . . Proc. WWW8 Conference , 1999 14. Leymann, F., Roller, D., Schmidt, M.-T., Web services and business process management. IBM Systems Journal , Vol. 41, No.2, 2002 15. Rivest, R., Adleman, L., Dertouzos, M.L., On Data Banks and Privacy Homomorphisms. In Foundations of Secure Computations. Academic Press, New York, 1978 16. Rivest, R., Shamir, A., Adleman, L. A Method for Obtaining Digital Signatures and Public- key Cryptosystems. In Communications of the . . . . . . S.H., Building a High-Performance, Programmable Secure Coprocessor. In Computer Networks, Special Issue on Computer Network Security ; Nr. 31(1999), S. 831-860 20. Stallings, W., Cryptography and Network Security: Principles and Practice . Prentice-Hall, 1999 . . . . . . Smith, S.W., Weingart, S.H., Building a High-Performance, Programmable Secure Coprocessor. In Computer Networks, Special Issue on Computer Network Security ; Nr. 31(1999), S. 831-860 20. Stallings, W., Cryptography and Network Security: Principles and Practice . Prentice-Hall, 1999 . . . --3000,6,250,2813,50707
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