A method for protection against change of data and for authentication of the data transmitter in the case of the transmission of data by use of encryption methods in which, with knowledge of the encrypted and unencrypted data of other data is not more than randomly can be encrypted correctly.

摘要

A method for protection against change of data and for authentication of the data transmitter in the case of the data transmission, in which the data to be protected, referred to as the original - or source data, can be expressed as the number or sequence of numbers, i.e, all the digital or item of digitisable information, and which, if it to the use of the in the further said encryption method is necessary, first in a number or sequence of numbers be translated, the so-called swelling section number or swellability number a result of which, in order to encryption with the aid of a key is available and for the case of a swelling section number a result of which for each swellability number of the swelling section number a result of an associated key is intended to give a keys, so that the encryption methods known as swelling individually for each number of the swelling section number, with the help of the associated key from the keys is carried out and formed from the code number or code number sequence, the code data are derived, which is characterized in that before the data transmission is applied an encryption methods that, with the aid of a number for each individual swelling section, each of which consists of..