ELECTRONIC BLOCK CIPHER DEVICE SUITABLE FOR OBFUSCATION Russian patent published in 2018 - IPC H04L9/06 

FIELD: data processing.

SUBSTANCE: invention relates to the digital data encryption. Device comprises a storage unit storing multiple substitution boxes in the form of look-up tables, wherein the multiple substitution boxes together forming a substitution layer of a block cipher, wherein the substitution layer being arranged to take a substitution layer input and transforming it into a substitution layer output, wherein at least one substitution box being arranged to receive as input a combination of at least part of the outputs of more than one further substitution boxes in the same substitution layer, control unit configured to apply the block cipher to the message block of digital data by applying a sequence of block cipher rounds to the message block, wherein one of the block cipher rounds comprising the substitution layer.

EFFECT: technical result is improved data security.

12 cl, 8 dwg