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Data Encryption Secure Data

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Data Encryption

Secure communication and storage of data on a computer is a key issue for protecting sensitive data that is stored or sent through electronic communication.


Data encryption refers to mathematical calculations and algorithms that transform plaintext into cyphertext, a form that is non-readable to unauthorised parties. The recipient of an encrypted message uses a key which triggers the algorithm mechanism to decrypt the data, transforming it to the original plaintext version Data encryption definition

Businesses and criminals wish to keep their data hidden and unreadable.


Why encrypt?

  • Confidentiality
  • Integrity

In cryptography the following terms are commonly used:

  1. Plaintext: Unencrypted text
  2. Ciphertext: Encrypted form of the plain text
  3. Cipher: A method of encryption and decryption, a.k.a. encryption algorithm
  4. Key: A specific string of data that is used to encrypt and decrypt messages - the password
  5. Encode: Convert plaintext into ciphertext
  6. Decode: Convert ciphertext into plaintext
  7. Encryption: the process of disguising a message so as to hide the information it contains

There are two main areas of encryption,

  1. Symmetric Key Encryption: using the same key (password) to encrypt and decrypt data
  2. Asymmetric Key Encryption: using different keys to encrypt and decrypt data