Symmetric Cryptography and Asymmetric Cryptography (Symmetric Encryption Asymmetric Encryption and)
Encryption or Encryption Standard Data Symmetric cryptography is a cryptographic method which uses the same key to encrypt and decrypt messages. The two communicating parties have to agree in advance on the key to use. Once both have access to this key, the sender encrypts a message using it, send it to the recipient, and the receiver decrypts with it. Security A good cipher puts all the security in the key and nothing in the algorithm. In other words, it should be of no help to an attacker to know the algorithm being used. Only if he obtains the key would knowledge of the algorithm. Encryption algorithms are widely used these properties (for example, GnuPG on GNU). Since all the security is the key, it is important to be very difficult to guess the key. This means that the range of possible keys, ie, the space of possible keys must be broad. Richard Feynman was famous in Los Alamos for its ability to crack safes, to fuel the legend that he had around him, carried around a set ...