Image decryption apparatus

A display processor displays on a display screen an encrypted image accepted by an image data acceptor. An encrypted region acquirer extracts encrypted regions contained on the encrypted image. A target region selector or an authorized target region selector selects decryption target regions from among encrypted regions contained in the encrypted image. A decryption order determiner determines a decryption order of the decryption target regions. The display processor displays on the display screen a prompt for inputting a decryption key (or a password) used for decryption of the encrypted image in each of the decryption target regions in accordance with the decryption order. A decryption key acceptor accepts the decryption key input by a decryption user. An image decryptor performs a decryption process on the encrypted image in the decryption target regions in accordance with the decryption order. A decrypted image of each decryption target region is output.