DATA PROCESSING DEVICE, DATA PROCESSING METHOD, AND PROGRAM Russian patent published in 2016 - IPC H04L9/06 G09C1/00 

FIELD: information technology.

SUBSTANCE: invention relates to information security. Data processing device includes: data conversion processing circuitry configured to divide and input configuration bits of data to be processed into a plurality of lines, and to repeatedly execute a data conversion processing as to data in each line; wherein data conversion processing circuitry includes an F function executing unit configured to input one line of data configuring plurality of lines, and to generate conversion data; wherein F function executing unit includes a non-linear conversion processing circuitry configured to execute a non-linear conversion processing; wherein non-linear conversion processing circuitry includes a repeating structure from bit rearrangement unit and non-linear calculation unit; wherein plurality of non-linear calculation units, included in repeating structure, include at least two or more different non-linear calculation units, having different configuration of calculations.

EFFECT: technical result is high level of protection due to repetition of structure of logical calculations and rearrangement of bits.

13 cl, 29 dwg