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In today's developing age technologies have developed so much most of every person use laptop, desktop, mobile, notepad etc. in their daily life to transfer their secret information across World Wide Web. Some people are waiting for this type of secret information which they called hacker and then change their information which they called cracker so, to protect their secret information from this type of unauthorized peoples they must secure their data so, that reason this paper discuss security techniques. This paper discusses a cryptography and stegnography techniques to protect secret data. Cryptography is a technique in which original data is converted to unreadable form so user cannot understand what data to be transfer across the network. Stegnography hide the data into cover media.
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