Due to the globalization it is easy to pirate ICs, overbuild IC, and insert Trojan, etc. To protect industries from the illegal production, several methods have been introduced. Logic locking is a method, which locks the functionality of the circuits by using keys. In conventional logic locking method, a single key locks the circuit whereas in weighted logic method the circuit is locked by multiple keys instead of a single key. Normally at highest fault impact location, key gates are inserted, each key gate has corresponding key input. In this work, the comparison between the normal fault impact type insertion and weighted logic locking type insertion are presented. It is observed that there is an increase in the hamming distance (HD), which is the corruptibility of output. The weighted logic locking method which is immune to key sensitization attack and achieves 50% HD and reduces the execution time. Weighted logic locking is a generic method and can be merged with any of the existing methods and thereby gain advantages.
Weighted Logic Locking to Increase Hamming Distance against Key Sensitization Attack
2019-06-01
1196905 byte
Conference paper
Electronic Resource
English
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