Thomas Schweinberger

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This document describes the Advanced Cryptographic Engine (ACE). It specifies a public key encryption scheme as well as a digital signature scheme with enough detail to ensure interoperability between different implementations. These schemes are almost as efficient as commercially used schemes, yet unlike such schemes, can be proven secure under reasonable(More)
LIMITED DISTRIBUTION NOTICE This report will be distributed outside of IBM up to one year after the IBM publication date. Abstract A key issue in authorization services and computer security in general is the deenition of security policies 1]. To help deene security policies we have developed a new policy language for authorization systems (PLAS), and a(More)
This document describes the part of the Advanced Cryptographic Engine (ACE) pertaining to public key encryption. It specifies a public key encryption scheme with enough detail to ensure interoperability between different implementations. This scheme is almost as efficient as commercially used schemes, yet unlike such schemes, can be proven secure under(More)
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