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The development of telecommunications technology and data storage using the computer has become a necessity because there are many jobs that can be completed quickly, accurately, and efficiently. In addition it allows data transmission distance is relatively fast and cheap, but on the other hand long-distance data transmission is possible others can tap into and alter transmitted data as the number of users that many in a computer network. Therefore, the system of data security and confidentiality of data is one important aspect in the development of the world of telecommunications, especially communications and using computers connected to the network.
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