Correlated power analysis (CPA) is an effective method of attacks aimed at cryptographic modules, and the countermeasures against CPA are considered to be a challenge to the cryptographic modules designers. Based on DES modules, the CPA principle aimed at security cryptographic module is analyzed in this presentation, especially, the noise sources along with DES module working and the influences of the ones to attacks and countermeasures are mainly focused. Since using the white noise, which is always used as power hiding in cryptographic modules, would be a problem, a new concept of using correlated noise instead and the scheme of the implementation of this concept, the pipelined DES module are proposed in this presentation. By analyzing the structure of the noise components of the pipelined DES and calculating the correlated coefficient between real power traces and Hamming Distance model of hypothesis keys, it can be derived theoretically that adding correlated noises can reduce the correlation coefficient, which can enhance the capability of anti-CPA of the cryptographic modules.