Is it hard to retrieve an error-correcting pair?
Abstract
Code-based cryptography is an interesting alternative to classic number-theory Public-Key Cryptosystems (PKC) since it is conjectured to be secure against quantum computer attacks. Many families of codes have been proposed for these cryp-tosystems. One of the main requirements is having high performance t-bounded decoding algorithms which is achieved in the case the code has a terror correcting pair (ECP). The class of codes with a t-ECP is proposed for the McEliece cryp-tosystem. The hardness of retrieving the t-ECP for a given code is considered. To this end we have to solve a large system of bilinear equations. Two possible induction procedures are considered, one for sub/super ECP's and one by punctur-ing/shortening. In both procedures in every step only a few bilinear equations need to be solved.
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