Patent ID: 7086087

Claim:
A semiconductor chip comprising: an information processing device; an information memory device; an encryption device; a decryption device; and a data bus, wherein two value information corresponds to two different voltages in the semiconductor chip, wherein data is transferred from the information processing device to the information memory device through the data bus and stored in the information memory device after the data has been encrypted by the encryption device, and wherein data read from the information memory device is input into the information processing device through the data bus after the data has been decrypted by the decryption device; wherein the sum of the amount of power consumed by a charging and discharging device and the amount of power as a current flowing through any signal line of the memory device is fixed by utilizing bits inversion of a digital signal representing the data and supplying the signal to an electrical charge and discharge device; wherein the signal line is electrically charged and discharged with the encrypted data different from an original data; and reducing the power consumption.