Method and apparatus for encrypting and decrypting data

摘要

The data encoding method involves generating a key vector (S) of a second long length from a secret key vector (SI) of a short first length and a public matrix (M) and forming a code vector from a data vector of a third length, which is shorter than or equal to the second length, and the key vector using a first coding technique. AN Independent claim are included for the following: (1) a method of decoding data, (2) an arrangement for encoding data, (3) an arrangement for decoding data, a coding signal, (4) a computer program and a computer program product for implementing the inventive method.