A Dual-Rail Signal Parallel Routing Method to Counteract DPA Attacks
Zhang Min-xuan · Computer Engineering and Science · 2011
Dual-rail pre-charge logic is an effective technique to counteract differential power analysis(DPA) attacks.The key problem is to guarantee the symmetrical capacitive loads between true and false logics.A dual-rail signal parallel routing method based on commercial placerouting EDA is proposed in this paper to get symmetrical capacitive loads.Firstly,the single-rail nets are routed in odd routing tracks by EDA and then dual-rail wires are obtained by duplicating and moving the routed wires to the even routing tracks.As a result,each pair of dual-rail signal wires has the same routing structure and capacitance.The parallel routing method is implemented in an AES(Advanced Encryption Standard) coprocessor.The experimental results indicate that the capacitances of the dual-rail signal wires are perfectly balanced.