Cryptography System

  • Cryptography is a practice of creating and using encryption system
  • Cryptographic system is a method of hiding data so that only certain people can view
  • Plain text is the original data
  • Ciphertext is the protected data or the encrypted text
  • Encryption is the process or procedure to convert plain text to ciphertext
  • Decryption is the procedure of converting ciphertext to plain text
  • Cryptographic system consist of algorithm + key + key management facilities

2 basic type of cryptographic system

Symmetric

  • Have only one key – private key
  • use the same key to encrypt and decrypt

Asymmetric

  • Have 2 key
  • Public and private

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