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Grey Box Implementation of Block Ciphers Preserving the Confidentiality of their Design
Authors: Vincent Carlier, Hervé Chabanne, Emmanuelle DottaxAbstract:
In 1997,Patarin and Goubin introduce new asymmetric cryptosystems based on the difficulty of recovering two systems of multivariate polynomials from their composition. We make a different use of this difficult algorithmic problem to obtain a way of representing block ciphers concealing their design but still leaving them executable. We show how to implement our solution with Field Programmable Gate Array. Finally, we give a compact representation of our solution using Binary Decision Diagrams.
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