substitution cipher


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substitution cipher

[‚səb·stə′tü·shən ‚sī·fər]
(communications)
A cipher in which the characters of the original message are replaced by other characters according to a key.
References in periodicals archive ?
R presents two layer securities, which includes both transposition and substitution cipher.
Then the items in the database are encrypted with a substitution cipher text after the insertion of fictitious transactions into the cipher text.
Clelland [16] used a substitution cipher to encode characters to DNA strands.
If you and a friend want to exchange coded messages, you could send a backwards message or use a rail fence cipher or a substitution cipher.
have used a substitution cipher for plaintext encoding where base triplet is assigned to each letter of the alphabet, numeral and special characters and demonstrated a steganographic approach by hiding secret messages encoded as DNA strands among multitude of random DNA [14].
The main idea is that the plain text is encrypted with a substitution cipher using a secret random key.
Our students enjoyed trying to solve a simple substitution cipher using frequency tables.
About 2,000 years ago, transposition ciphers had made the barest appearance and Julius Caesar carried on correspondence in a very simple substitution cipher.
This third programme, Le Chiffre Indechiffrable, traces the search for a new system of encryption, following the cracking of the mono-alphabetic substitution cipher.
Criminals typically use homemade, simple substitution cipher systems which use a single cipher text character to replace a plain text character.
In a substitution cipher, the letters of the plaintext are replaced by other letters, symbols, or numbers (e.
It's probably some kind of letter substitution cipher.