enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Caesar cipher - Wikipedia

    en.wikipedia.org/wiki/Caesar_cipher

    The cipher illustrated here uses a left shift of 3, so that (for example) each occurrence of E in the plaintext becomes B in the ciphertext. In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques.

  3. ROT13 - Wikipedia

    en.wikipedia.org/wiki/ROT13

    The key to decrypt a message requires no more knowledge than the fact that ROT13 is in use. Even if secrecy does not fail, any alien party or individual, capable of intercepting the message, could break the code by spending enough time on decoding the text through frequency analysis [ 2 ] or finding other patterns .

  4. Vigenère cipher - Wikipedia

    en.wikipedia.org/wiki/Vigenère_cipher

    For example, in a Caesar cipher of shift 3, a would become D, b would become E, y would become B and so on. The Vigenère cipher has several Caesar ciphers in sequence with different shift values. To encrypt, a table of alphabets can be used, termed a tabula recta, Vigenère square or Vigenère table. It has the alphabet written out 26 times in ...

  5. Trivium (cipher) - Wikipedia

    en.wikipedia.org/wiki/Trivium_(cipher)

    To initialize the cipher, the key and IV are written into two of the shift registers, with the remaining bits starting in a fixed pattern; the cipher state is then updated 4 × 288 = 1152 times, so that every bit of the internal state depends on every bit of the key and of the IV in a complex nonlinear way.

  6. Affine cipher - Wikipedia

    en.wikipedia.org/wiki/Affine_cipher

    The Caesar cipher is an Affine cipher with a = 1 since the encrypting function simply reduces to a linear shift. The Atbash cipher uses a = −1 . Considering the specific case of encrypting messages in English (i.e. m = 26 ), there are a total of 286 non-trivial affine ciphers, not counting the 26 trivial Caesar ciphers.

  7. Cryptography - Wikipedia

    en.wikipedia.org/wiki/Cryptography

    Symmetric-key cryptosystems use the same key for encryption and decryption of a message, although a message or group of messages can have a different key than others. A significant disadvantage of symmetric ciphers is the key management necessary to use them securely. Each distinct pair of communicating parties must, ideally, share a different ...

  8. Ciphertext - Wikipedia

    en.wikipedia.org/wiki/Ciphertext

    Stream ciphers encrypt plaintext digits one at a time on a continuous stream of data, with the transformation of successive digits varying during the encryption process. In an asymmetric key algorithm (e.g., RSA), there are two different keys: a public key and a private key. The public key is published, thereby allowing any sender to perform ...

  9. Nonlinear-feedback shift register - Wikipedia

    en.wikipedia.org/wiki/Nonlinear-feedback_shift...

    Nonlinear-feedback shift registers are components in modern stream ciphers, especially in RFID and smartcard applications. NLFSRs are known to be more resistant to cryptanalytic attacks than Linear Feedback Shift Registers .