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Due to massive growth in communication technology and the tremendous growth in internet technology in the last decade, it has become a real challenge for a sender to send confidential data from one computer to another. The security of data has now become a big issue in data communication network. It is not a difficult job for a hacker to intercept that mail and retrieve the question paper if it is not encrypted. Breaking weak password is now not a problem. Public software are available to decode password of some unknown e-mail.
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