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As the technology advances day by day, sharing of information through Internet is growing rapidly, which increases new information threats and vulnerabilities and hence the need to protect information to ensure its confidentiality, integrity, and authenticity require constant enhancements. Over the past two decades Cryptographic techniques are essential component of any secure digital communication. Cryptographic algorithms like DES, IDEA, AES etc., are proposed to provide high confidentiality, authenticity and integrity. With the rapid growth in the technologies, the processing speeds are increasing and as a result some of the algorithms are becoming obsolete and some require higher key lengths.
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