Abstract: In this paper, the concept "integration of information security chips based on SiP" is proposed, in order to solve the problem that it's hard to integrate the logic chips or blocks with the memory in security systems, while bringing better performance on high-quality, lower-power consumption and high-reliability.The detailed development flow is expounded, and a product of SiP integrating CPU, Flash memory and cryptographic chip is designed.The function and properties of the SiP product satisfy the requirement, thus certificating the feasibility of this scheme.And the scheme represents the major tendency for the electronic technology and information security system in the future.