Patent ID: 9158943
Filing Date: 2015-10-13
Classification: G06F

Abstract:
1. An encryption and decryption device for a portable storage device, comprising: a storage element; a control element receiving a password, storing the password in the storage element, and providing an encryption and decryption command; and an encryption and decryption circuit electrically connected to the portable storage device, receiving the encryption and decryption command, reading the password stored in the storage element according to the encryption and decryption command, and encrypting or decrypting data stored in the portable storage device by utilizing the password according to whether the data are encrypted, wherein after the data are encrypted or decrypted, the encryption and decryption circuit clears the password in the storage element, and wherein when the data are encrypted, the encryption and decryption circuit decrypts a verification code of the portable storage device, and checks whether the password matches the decrypted verification code to determine whether to decrypt the data.