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Image forming apparatus performing control of browsing of a file by a terminal, terminal, file browsing control system, image forming method, and recording medium
申请公布号：US9430661(B2)
申请号：US201414292834
申请日期：2014.05.31
申请公布日期：2016.08.30
发明人：Toyoda Takashi;Oyasato Tomoki
分类号：G06F21/60
主分类号：G06F21/60
代理人：Hawaii Patent Services ;Fedde Nathaniel K.;Fedde Kenton N.
地址：Osaka JP
摘要：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.
主权项：1. A file browsing method that performs control of browsing of a file with an image forming apparatus and a terminal, the method comprising: via the image forming apparatus, determining whether a user of the image forming apparatus is an authorized user;encrypting the file of the authorized user with a public key;storing a plurality of viewers for causing the file to be browsed at the terminal, wherein:each of the plurality of viewers includes position information to permit browsing of said encrypted file and a secret key to decrypt the encrypted file, wherein the position information is not included in the file;the position information of each of the plurality viewers includes, in accordance with an authority of a user caused to browse at the terminal and a type of the viewer, an allowable position or an allowable position range, the plurality of viewers including i) a first viewer for a cooperative company having first position information, wherein the first position information allows the file to be browsable only from a predefined location, ii) a second viewer for a general partner having second position information, wherein the second position information allows the file to be browsable from any of a plurality of predefined locations, and iii) a third viewer for a senior management employee having third position information, wherein the third position information allows the file to be browsable from any location; and the secret keys vary for each of the plurality of viewers; setting, in each of the plurality of viewers, the position information to permit browsing of said the encrypted file at the terminal;setting, in each of the plurality of viewers, the secret key to decrypt the encrypted file; andtransmitting to the terminal the encrypted file and the plurality of viewers; and via the terminal,receiving from the image forming apparatus the encrypted file and the plurality of viewers transmitted;storing the encrypted file and the plurality of viewers received from the image forming apparatus;calculating a current position of the terminal using a Global Positioning System (‘GPS’) reception unit comprising a receiver and an antenna;determining whether the position information included in a viewer of the plurality of viewers received from the image forming apparatus and stored in the terminal coincides with the current position of the terminal;reading the secret key of the viewer of the plurality of viewers received from the image forming apparatus and stored in the terminal; anddecrypting the encrypted file using the secret key of the viewer of the plurality of viewers received from the image forming apparatus and stored in the terminal and causing the decrypted file to be browsed, if the position information of the viewer of the plurality of viewers received from the image forming apparatus and stored in the terminal coincides with the current position of the terminal,wherein the image forming apparatus is a multifunctional peripheral (‘MFP’).