One symbol could be substituted with a key using substitution cipher. true or false
Answers
True. A symbol was substituted for an alphabet and could only be read with the key.
Ciphers are codes used to hide the true meaning of a sentence or phrase. Ciphers can be created by anyone and have been in use from the tie of the romans. One of the most famous ciphers is known as Caesar’s cipher after the Roman emperor Julius Caesar.
A very common cipher is the substitution cipher which employs a repeated substitution strategy to make the code undecipherable. In order to make it difficult to crack, the only ways to break the code are using the key to the cipher or through a brute-force attack. The brute attack is time consuming and is therefore not a recommended approach to breaking the cipher.
In this cipher, symbols replace letters of the alphabet and are arranged in a fixed pattern. The meaning of all the symbols is displayed in the key to the cipher. Anyone with the key can read the meaning of the code.
"Substitution cypher is a form of code which is used for encrypting data since ancient times. To obtain the data in the cypher, the pre set key for the cypher needs to be known.
To unlock the cypher without the key, one can substitute any letter for the key and try to decipher the cypher. However doing this would involve substituting each letter for the key, one at a time. This can be a very lengthy process, but sometimes the only process to unlock the cypher."