Information Security -Network Security & Cryptography

admin — Tue, 10 Nov 2009 08:38:07 +0000

Cryptography is the technique of writing in secret code; there are two type of cryptography symmetric and asymmetric. Symmetric-key cryptography indicate to encryption techniques in which mutually both the sender and receiver share the same key to encrypt and decrypt a message, and Asymmetric cryptosystem use one key (the public key) to encrypt a message and a different key (the private key) to decrypt the encrypted message. Asymmetric cryptosystems are as well known as public key crypto systems.

Cryptography is core techniques which are being used in computer and network security for such things as access control and information confidentiality and are not easy to break. Typically the Encryption is the transformation of data or message into a form that is as close to impossible as possible to read without the appropriate knowledge. Its intention is to ensure privacy by keeping information hidden from anyone or unauthorized person, even those who have access to the encrypted data. Decryption is the reverse of encryption; it is the transformation of encrypted data back into an intelligible form.

Also Endorsement & Verification is key element of our lives as privacy that is the reason Authentication is essential in our day to day life with any kind of transactions- when we sign our name to some document, in case doing online transaction our decisions and agreements are communicated electronically, we need to have electronic techniques for providing authentication. In such case a digital signature is recommended which is reminiscent of an ordinary signature with characteristic that it is easy for a user to produce and same time making it difficult for anyone else to forge.

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Information Security -Network Security & Cryptography