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There exist three different types of methods to obtain a signature scheme with code-based systems (like for number theory–based schemes). The first method (similar to the RSA signature) consists in being able to decode a random element of the syndrome space. This point of view is developed by Courtois-Finiasz-Sendrier [1] and necessitates to hide very large codes to obtain a reasonable probability of decoding (cf. “Digital Signature Scheme Based on McEliece”). The second method uses zero-knowledge identification algorithms together with the Fiat-Shamir paradigm [2], which permits to transform such an algorithm into a signature algorithm. It generally leads to very long signature. For coding theory, the Stern identification protocol [3] is the most efficient. The last method (similar to the El Gamal signature scheme) consists in building a special subset of the...
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Gaborit, P., Sendrier, N. (2011). Digital Signature Schemes from Codes. In: van Tilborg, H.C.A., Jajodia, S. (eds) Encyclopedia of Cryptography and Security. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-5906-5_379
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