Cryptography

"Cryptography is a technique to convert a message or information into a different form to ensure the security of that information or message, so that an unauthorized user who doesn't have the key to decrypt the information can't read that information."

Cryptography is a famous technique, which is used in security in order to transform a message or information into the other form, so that non authorized or an unwanted person or party can not read that message or information. Basically it is used over the Internet to encrypt your messages or credit card like information so that an intruder or hacker can not steal your information over the Internet. Cryptography can be broken using cryptanalysis technique, However cryptography has been improved a lot today. So it is not a child's play to breach modern cryptography techniques.

Cryptography includes several components to secure a message or information. Like

• Encryption and decryption
• Message digests and hash functions
• DES (Data Encryption Standard)
• AES (Advanced Encryption Standard)

Cryptography also aids some other aspects of security like:

• Authentication: Authenticates a user to read an encrypted message
• Integrity: To ensure that data is not tempered or changed after dispatch.
• Non-repudiation: Checks that the sender doesn't deny massage sending or created copies of message.

On the contrary Decryption is used to convert cypher text or encoded text into a readable message or plain text. Decryption is a reverse process of encryption.

So we have learned now, What is encryption and decryption ? And in what manner this is used, keep learning from computerflicks. Please leave comments.