A configurable device for lattice-based cryptography

摘要

Some embodiments relate to a first electronic network node 110 configured for cryptographic processing. The first electronic network node is configured to receive the difficulty parameter d and the structural parameter n as inputs and to obtain the shared matrix A, which is shared with the second network node via the communication interface. The entry in the shared matrix A is selected by the modulo according to the first modulus q, and the shared matrix A is a square matrix kxx of magnitude k equal to the difficulty parameter d divided by the structural parameter n, the shared matrix A. The entry in is a modulo polynomial with an irreducible polynomial f of degree equal to the structural parameter n, and the cryptographic processing uses the shared matrix.