Patent ID: 8543835

Claim:
A system for increasing a tamper resistance of a digital data processing device, comprising: a first processor comprising: means for cryptographically processing incoming first digital data using one or more first values looked up in at least one look-up table of look-up tables in a look-up table network, the look-up tables operatively coupling each other; a second processor comprising: means for computing at least one second value; means for inserting the at least one second value into second digital data to from the first digital data, the at least one second value causing the means for cryptographically processing incoming first digital data to look up a predefined entry of the at least one look-up table when processing the first digital data having the at least one second value, and a transmitter for transmitting the first digital data having the at least one second value to the first processor; and means for verifying the at least one look-up table in the look-up table network of the look-up tables based on the at least one second value inserted into the second digital data by enforcing the means for cryptographically processing incoming first digital data to look up the predefined entry of the at least one look-up table based on the at least one second value inserted into the second digital data and comparing an output of the means for cryptographically processing incoming first digital data with a reference value.