Abstract: There is provided an image forming apparatus that eliminates the need for separately preparing an encrypted file for each user. To achieve this, the image forming apparatus performs control of browsing of a browsing file that is browsed at a terminal. The document acquisition portion of the image forming apparatus acquires document data. The document encryption portion encrypts the document data with a public key as the browsing file. The position information setting portion sets position information to permit browsing of the browsing file encrypted by the document encryption portion in a viewer for causing the browsing file to be browsed at the terminal. In the case where it has been determined that the position information coincides with a current position, a browsing execution portion at the terminal uses a secret key to decrypt the browsing file for causing it to be browsed.

Abstract: Authentication involves collecting information relating to a user's behavior relative to a mobile device carried by the user, over a number of time periods that correspond to each other. An authentication technique includes processing the collected information to generate baseline data representing typical user behavior. The authentication technique includes collecting additional information relating to the user's behavior relative to the mobile device over another time period that corresponds to the time periods used to generate the baseline data. The additional information relating to the user's behavior is compared to the baseline data, and a difference between the additional information and the baseline data is determined. An authentication procedure is then applied based on the difference. The authentication may be performed by a mobile device such as a smartphone.