What is the encryption key?

Cipher may generally refer to a coded message. It can also refer to a cryptographic system in which symbols or groups of symbols represent a part of the text - either individual or longer - and/or units of text are re -grouped according to a set of rules that were predetermined. The cipher key is the information needed to use the cipher. The simple text is manipulated twice. First, it is encrypted to hide the meaning. The Plaintext message is then said to be encrypted or encrypted and can be called ciphertext . Then it is decrypted to detect the simple text again. In any case, the cipher key is required.

There are several levels of cipher complexity. The most basic cipher has a simple alphabet, which is the usual alphabet of English, and the Cifhertext alphabet, which is the same alphabet from a letter other than and and the letters that were removed from the front marked on the back. Early and famous use of cipher was done by Julius Caesar who used this encryption method to send messages withto the exit. 2

A total of 25 different ciphers can be done by shifting the alphabet of ciphers to begin with each letter in addition to and . But even with many options, an unauthorized person who is preparing an encrypted message and knows that it is a cipher, has straight, although fatigue, the way to find it, even without accessing the cipher key.

You want to send a message, one uses the Cipher key to determine the Ciphertext alphabet. Then for every simple text letter that one wants to communicate, he writes in his place. So if one has decided to encrypt wisegeek , one hand with:

zlvhjhhn

In order to decrypt the dialstext, the cipher key would be used to design the Ciphertext alphabet and replace a letter of simple text for each letter Ciphertext.

In the ciphers, there are several obvious tracks that help reveal the message in this type of simple ciphers. One of them is that the Cipher MessageThe text will be nonsense, which will be a strong leash that the cipher was used. Second, the frequency of letters that are well known to exist in English - create e, t, a, o, and n The most common letters - are likely to help reveal some of the strong traces of the arrow when the length report.

Although the simple type of ciphers described can be interrupted and is no longer seriously used, there are more complex. With these ciphers and simple, the security of the key is necessary for the correct transfer of the encrypted message. Inability of the recipient to get the key means that the message will be read. The cipher key falling into the wrong hands destroys the security of the message. For this reason, the cipher management is an essential element of cryptography.