Method and data transmission system for bidirectional data transmission between two devices

摘要

The method involves the first device sending a random number and the second device receiving it, encoding the random number in the first and second devices in accordance with a common encoding function taking into account a common secret key and determining the bit number per block of transmitted or received data in the first and second devices. AN Independent claim is also included for the following: a data transmission system for Bi-directional data transmission between two devices.