CRYPTOGRAPHIC DEVICE WITH VARIABLE CONFIGURATION Russian patent published in 2021 - IPC H04L9/30 

FIELD: information technology.

SUBSTANCE: invention relates to a network node configured to carry out a cryptographic operation, a method for performing a cryptographic operation, and a computer-readable storage medium. The technical result is achieved due to the fact that the first network node is configured to receive the complexity parameter () and the structure () parameter as an input and obtain a common matrix (), wherein the common matrix is ​​shared with the second network node via a communication interface, the elements in the common matrix are selected modulo the first modulus (, the common matrix () is a square matrix () of size () equal to the complexity parameter () divided by the structure parameter (), the elements in the common matrix () are polynomials modulo the polynomial () of reduction of the degree equal to the structure parameter (), and the specified cryptographic operation uses a common matrix.

EFFECT: technical result consists in providing a secure cryptographic key exchange scheme.

15 cl, 6 dwg, 3 tbl