APPARATUS SAFE FROM POWER CONSUMPTION ANALYSIS ATTACK FOR ENCRYPTING AND METHOD FOR OPERATING SAME

摘要

An encryption apparatus and operating method thereof is provided. The encryption apparatus may include an encryption module to perform an encryption module. In a first state corresponding to a time period before an encryption algorithm is performed, a first charge transfer unit included in the encryption apparatus may receive a charge (or power) supplied by an external power source, and may store the received charge (or power) in a charge storage unit included in the encryption apparatus. In a second state corresponding to a time period during which the encryption algorithm is performed, a second charge transfer unit included in the encryption apparatus may transfer the charge stored in the charge storage unit to the encryption module. In a third state corresponding to a time period after the encryption algorithm is performed, the charge storage unit may discharge a charge storing device included in an internal portion of the charge storage unit which stores a charge. In the second state, the first charge transfer unit may disconnect a ground terminal of the encryption module from a ground terminal of the external power source.