Side-channel leakage model and security analysis

Side-channel attack is a new cryptanalysis,and it utilizes the run-time leakages to extract the secret.From the point of information leakage,this paper poposed a three-level leakage model through a formal description.The proposed model included the algorithm-level leakage,instruction-level leakage and gate-level leakage.Based on this model,discussed diffe-rent countermeasures on each leakage level.And then gave a suggestion to build a secure cryptographic chip.