Difference Between Confusion and Diffusion

Confusion and diffusion both are area unit the properties for creating a secure cipher. Each confusion and diffusion area unit wont to stop the secret writing key from its deduction or ultimately for preventing the first message. Here this article gives information about the main key difference between confusion and diffusion to better understand this topic.

The main key difference between cofusion and diffusion:


  • Confusion is a cryptographic technique that is used to create faint ciphertext, while diffusion is used to create cryptic plain texts.
  • Confusion is technique is possible through substitution algorithms, while diffusion is possible through transportation algorithms.
  • Confusion obscures the relationship between the plaintext as well as the ciphertext, diffusion spreads the plaintext statistical through the using
  •  ciphertext.
  • In confusion, if one bit within the secret modified, most or all bits within the chipper text also will be modified, While in diffraction, if one image within the plain text is modified, many or all images within the ciphertext also will be modified.
  • In confusion, vagueness is increased in resultant, while in diffusion, redundancy is increased in resultant.
  • Both stream cipher and block cipher uses confusion, while in diffusion only block cipher uses diffusion.
  • The confusion is the relation between ciphertext and using the key is masked, while in the diffusion is a relation between the ciphertext and the plain text is masked by the diffusion.
  • In confusion, if one bit within the secret modified, most or all bits within the ciphertext also will be modified, while in diffusion, if one image within the plain text is modified, many or all images within the ciphertext also will be modified.
  • Confusion hides the relationship between the ciphertext and key, while the diffusion hides the relation between the ciphertext and plaintext.
  • In confusion, the relationship between the statics of the ciphertext and the value of the encryption key is made complex, it is achieved by substitution, in diffusion, the statistical structure of the plain text is dissipated into long-range statics of the ciphertext this is achieved by permutation.
  • A one time pad relies entirely on confusion while in a simple substitution of a confusion only cryptosystem, while in diffusion double transportation is the classical example of a diffusion only cryptosystem.
  • If a single bit in the key is changed, most or all bits in the ciphertext will also be changed, if a single symbol in the plain text is changed several or all symbols in the ciphertext will also be changed.
Explore more information:
  1. Difference between encryption and decryption
  2. Difference between symmetric and asymmetric encryption
  3. Difference between cryptography and steganography
  4. Difference between AES and DES

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