CRYPTOGRAPHY

CRYPTOGRAPHY

Abstract:

Network security is the most important challenge faced by the present computer world. Web security is a complex topic, encompassing computer system security, network security, authentication services, message validation, personal privacy issues, and cryptography. However, the main objectives of network security are two fold: to prevent eaves dropping and to make it difficult to understand the stolen data. In this paper we try to throw light on “cryptography”.

Practical Cryptosystems include several algorithms, out of which many are currently used in applications. Some algorithms are more secure than others, while some have already been proved weak. This paper gives a brief view to many algorithms currently in use, and gives somewhat more details on the most widely used tools, also trying to predict their strength in the future applications. Here we have tried to take to you towards the basic cryptography, types of cryptography, public key cryptography, symmetric cryptography, and quantum cryptography.

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