翻訳と辞書 Words near each other ・ Timmenrode ・ Timmer ・ Timmerhuset ・ Timmerman ・ Timimoun Airport ・ Timimoun District ・ Timimus ・ Timinciler, Koçarlı ・ Timing ・ Timing (Kim Hyun-joong album) ・ Timing (music) ・ Timing advance ・ Timing attack ・ Timing belt ・ Timing belt (camshaft) ・ Timing channel ・ Timing closure ・ Timing diagram ・ Timing diagram (Unified Modeling Language) ・ Timing failure ・ Timing Is Everything ・ Timing Is Everything (album) ・ Timing Library Format ・ Timing light ・ Timing margin ・ Timing mark ・ Timing of Sahabah becoming Muslims ・ Timing point ・ Timing Synchronization Function ・ Timingila Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Timing channel ： ウィキペディア英語版 Timing channel A timing channel is one example of a covert channel for passing unauthorized information, in which one process signals information to another process by modulating its own use of system resources (e.g., central processing unit time) in such a way that this manipulation affects the real response time observed by the second process. The timing channel passes information by using the speed at which things happen. Actually, timing channels are shared resource channels in which the shared resource is time. A service program uses timing channel to communicate by using or not using an assigned amount of computing time. In the simple case, a multi-programmed system with two processes divides time into blocks and allocates blocks of processing alternately to one process and the other. ==Examples== Suppose there is a military base that has two people working at different security levels. The only way for both of them to communicate outside of the base is through 1 computer separate from their own that is called the transmitter computer and is very simple. It asks one computer for the data they want to send and then processes that if it was a 0 or 1. Then goes to the next computer and so on. The two people must transmit binary and do so continuously. If they want to send a 0, the transmitter computer immediately goes to the next computer for data. If they want to send a 1, the transmitter computer spends a very small amount of time sending the 1, then goes to the next computer. If there is computer A operated by someone at a very high security clearance and computer B operating at a lower security clearance, there is a chance computer B can read what computer A is sending. If B were to constantly send 0 forever, it can tell what A sends by keeping track of time. If there was a delay equal to the time it takes to transmit 1 before B is allowed to send, it knows A sent a 1. If not, it knows A sent a 0. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Timing channel」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.