Patent ID: 8645499

Claim:
An image processing system in which an image processing apparatus and a decryption server are interconnected via a network, wherein: the image processing apparatus comprises: a connector that removably connects to a portable recording medium storing: an encryption software application linked to a supplier of the portable recording medium or a supplier of the encryption software application itself; a target file encrypted by the encryption software application; and access information to access a decryption server decrypting the target file encrypted by the encryption software application, the decryption server corresponding to the encryption software application; a reader that reads out the encrypted target file and the access information from the portable recording medium connected to the connector; an accessor that accesses the decryption server corresponding to the encryption software application, on the basis of the access information obtained by the reader; a transmitter that transmits the encrypted target file to the decryption server accessed by the accessor; a receiver that receives the decrypted target file that is returned from the decryption server; and a file processor that processes the decrypted target file received by the receiver, and the decryption server comprises: a receiver that receives the encrypted target file from the image processing apparatus; a decryption executor that decrypts the encrypted target file received by the receiver; and an answer transmitter that returns the target file decrypted by the decryption executor, to the image processing apparatus.