Data Encryption by Two Keys

This Paper presents a new data encryption conception and algorithm. In this paper, one general data encryption key is used, and one more method encryption key is used too. By two keys method (TKE), the new algorithm obtain many useful properties, it operates quickly and easy perform by hardware, it has high encryption intensity and just like the DES when one bit in the data charged the encryption code will have many bits charged, it can make digital seal and digital signature, the length of data block can be changed, the encryption way can be changed easily and it not only can be used for big organization such as government, bank ...., but also for individual. As pages limited, the paper gives part research result and then other content will be described in other papers.