IMAGE FORMING APPARATUS, TERMINAL, FILE BROWSING CONTROL SYSTEM, AND IMAGE FORMING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an image forming apparatus for enabling browsing of a browsing document while maintaining security. ! SOLUTION: An image forming apparatus 1 controls browsing of a file for browsing by a terminal 2. An encryption part 110 encrypts a file 310 for browsing and browsing condition information 410 indicating the browsing conditions of the file 310 for browsing by a public key 191 for browsing. A browsing restriction file acquisition part 120 acquires a browsing restriction file 320. The browsing restriction file 320 is re-encrypted by a public key 292 for browsing restriction different from the public key 191 for browsing by the terminal 2 when the file 310 for browsing does not satisfy the browsing conditions. The browsing restriction file decryption part 130 decrypts the acquired browsing restriction file 320 by a secret key 192 for browsing restriction corresponding to the public key 292 for browsing restriction. A browsing condition resetting part 140 resets browsing conditi