A verification system includes: a code generation server publicizing time stamped codes; a proving device, including a video camera, that acquires a published time stamped code from the code generation server, and, while recording a video, incorporates the acquired time stamped code into the video; and a verifying device that receives the video, extracts the time stamped code from the content of the video, compares the time stamped code to published time stamped codes, and displays a verification of the published time stamped code.

In a first image formation mode, an image is formed with a first development contrast C1 and a specific dot pattern is formed with a second development contrast C2, which is lower than the first development contrast C1; in a second image formation mode, an image is formed with a third development contrast C3 and a specific dot pattern is formed with a fourth development contrast C4, which is lower than the third development contrast C3; and when ΔC1 (=C2/C1) denotes a ratio between the second development contrast C2 and the first development contrast C1, and ΔC2 (=C4/C3) denotes a ratio between the fourth development contrast C4 and the third development contrast C3, ΔC2<ΔC1 is satisfied.

An image forming apparatus comprises: an image forming unit configured to form an image; an image scanning unit configured to scan an image; and a control unit configured to perform control of the image forming unit and the image scanning unit, wherein the control unit controls the image scanning unit to scan an original, controls the image forming unit to form an additional image on the original after the scanning of the original is completed, and controls the image forming unit to form, after the formation of the additional image on the original is completed, an image in which the original is copied based on image information of the original scanned by the image scanning unit.

An image forming apparatus includes an image forming unit including a scanner and a printer, a server, and a local network circuit connecting the image forming unit and the server. In each of the image forming unit and the server, a hardware processor selects one of a first communication protocol and a second communication protocol in accordance with data to be transmitted by a transceiver. The first communication protocol includes a provision for ensuring reliability of communication, and the second communication protocol does not include a provision for ensuring reliability of communication.

An image processing apparatus that communicates with a server via a network, the image processing apparatuses being configured to use one or more application functions, the image processing apparatus includes a storage unit configured to store an audit log and the one or more application functions in association with each other, a designation unit configured to designate the one or more application functions as an application function for which acquisition of a log by the server is allowed, and a transmission unit configured to transmit the audit log associated with the one or more application functions designated by the designation unit to the server.

An image processing apparatus that communicates with a server via a network, the image processing apparatuses being configured to use one or more application functions, the image processing apparatus includes a storage unit configured to store an audit log and the one or more application functions in association with each other, a designation unit configured to designate the one or more application functions as an application function for which acquisition of a log by the server is allowed, and a transmission unit configured to transmit the audit log associated with the one or more application functions designated by the designation unit to the server.

An authentication system includes: a terminal; and an information processing apparatus communicable with the terminal via a network, the authentication system being configured to perform authentication of a user who operates the information processing apparatus. The information processing apparatus includes one or more first processors configured to: accept user information for use in authentication of the user; accept terminal information for use in identification of the terminal; and identify the terminal based on the terminal information, to transmit the user information to the terminal. The terminal includes one or more second processors configured to: store a job designated by the user; receive the user information from the information processing apparatus; and perform authentication of the user based on the user information received.

An image forming apparatus includes an image forming unit including a scanner and a printer, a server, and a local network circuit connecting the image forming unit and the server. In each of the image forming unit and the server, a hardware processor selects one of a first communication protocol and a second communication protocol in accordance with data to be transmitted by a transceiver. The first communication protocol includes a provision for ensuring reliability of communication, and the second communication protocol does not include a provision for ensuring reliability of communication.

The present disclosure provides an image management method and apparatus, and a storage medium. The method includes: receiving a download request of a first client device for a first image, and verifying whether the first client device has a download authorization of the first image; in response to the first client device having the download authorization, adding an encryption mark to the first image by using identity information of the first client device to obtain a second image; generating a download identification code for uniquely identifying the second image, and storing the download identification code; and transmitting the second image to the first client device.

An authentication system includes: a terminal; and an information processing apparatus communicable with the terminal via a network, the authentication system being configured to perform authentication of a user who operates the information processing apparatus. The information processing apparatus includes one or more first processors configured to: accept user information for use in authentication of the user; accept terminal information for use in identification of the terminal; and identify the terminal based on the terminal information, to transmit the user information to the terminal. The terminal includes one or more second processors configured to: store a job designated by the user; receive the user information from the information processing apparatus; and perform authentication of the user based on the user information received.