THIN CLIENT TERMINAL DEVICE, SERVER DEVICE, METHOD, AND PROGRAM

PROBLEM TO BE SOLVED: To solve the problem of a screen transfer type thin client system that when a thin client terminal becomes unable to connect to a server, it becomes impossible for a user to use a virtual PC present in the server.SOLUTION: The encryption master file of a virtual PC received in...

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Bibliographic Details
Main Author KOBAYASHI HIDETO
Format Patent
LanguageEnglish
Japanese
Published 14.12.2015
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Summary:PROBLEM TO BE SOLVED: To solve the problem of a screen transfer type thin client system that when a thin client terminal becomes unable to connect to a server, it becomes impossible for a user to use a virtual PC present in the server.SOLUTION: The encryption master file of a virtual PC received in response to a first signal transmitted to a server device is preserved along with a prescribed history number, and then an encrypted differential file received in response to a second signal transmitted to the server device is preserved along with a history number which has had a prescribed positive number added thereto each time the differential file was received, repeatedly at prescribed time intervals. The encryption master file and all of the encrypted virtual PC differential files are decrypted, and the decrypted differential files are reflected in the decrypted master file in increasing order of history number and a virtual PC file is generated, whereby a virtual PC is realized by using the virtual PC file. 【課題】 画面転送型シンクライアントシステムにおいて、シンクライアント端末がサーバと接続できなくなると、ユーザはサーバに存在する仮想PCを利用することができなくなる。【解決手段】 サーバ装置に送信した第一の信号に応じて受信した仮想PCの暗号化マスタファイルを所定の履歴番号とともに保存後、所定の時間間隔で、サーバ装置に送信した第二の信号に応じて受信した暗号化差分ファイルを履歴番号に対して差分ファイルの受信毎に所定の正数が加算された履歴番号とともに保存することを繰り返し、暗号化マスタファイル、全ての暗号化仮想PC差分ファイルを復号し、復号されたマスタファイルに復号された差分ファイルを履歴番号の小さい順に反映して仮想PCファイルを生成し、仮想PCファイルで仮想PCを実現する。【選択図】 図7
Bibliography:Application Number: JP20140112013