Distributed Encryption and Decryption Algorithms

André Postma, Willem de Boer, Arne Helme, Gerard Smit

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    In this paper, we describe distributed encryption and decryption algorithms. These algorithms are required in order to make a dependable distributed data storage system in which data is stored in an encrypted form resilient to a number of arbitrarily faulty nodes in the system. By execution of these algorithms, a group of n nodes is able to encrypt or decrypt data with any secret cryptographic function in the system in the presence of up to t arbitrarily faulty nodes, whereas the following requirements are met:
    - loss of information of up to t nodes never leads to loss of any cryptographic key
    - t or less nodes are unable to compute a secret cryptographic function and encrypt or decrypt data with it
    - any group of n - t or more nodes may encrypt or decrypt data with any cryptographic function.
    Original languageEnglish
    Place of PublicationEnschede
    PublisherUniversity of Twente
    Number of pages20
    Publication statusPublished - 1996

    Publication series

    NameMemoranda informatica
    PublisherUniversity of Twente, Department of Computer Science
    ISSN (Print)0924-3755


    • Dependable distributed systems
    • Fault-tolerance
    • Byzantine failure model
    • Security
    • Cryptography


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