Cryptograthy is used for security. Simply Cryptography is converting the understanable text to not understanable text.

Encryption means converting plaintext into cipher text.

Decryption means converting cipher text into plain text.

Purpose of cryptograthy

Cryptography is used to protect the data from theft.  And also used for user authentication.

Types of Cryptographic algorithms

There are 3 types of cryptographic algorithm. They are

  1. Secret Key Cryptography
  2. Public Key Cryptography
  3. Hash Functions

Secret Key Cryptography:

This cryptography is also known as Symmetric. Uses single key for both encryption and decryption.

Public Key Cryptography

This cryptography is also known as Asymmetric. Uses Two key for encryption and decryption. One for encryption and other for decryption.

Hash Function

This type uses mathematical transformation to encrypt and decrypt the data.



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