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Encrypt and Decrypt Cryptography (from Greek krypto κρύπτω, "hidden" and γράφω graphos, "write", literally "hidden writing")  is the art ociencia to encrypt and decrypt information using special techniques and is often used to allow an exchange of messages that only can be read by people who are targeted and have the means to decipher. Cryptography Encrypt and Decrypt License Font   More precisely, when it comes to this area of ​​knowledge and science, one should speak of cryptology, which in turn includes both encryption techniques, ie, cryptography itself as complementary techniques, among which is included cryptanalysis, which studies methods for breaking ciphertexts in order to recover the original information in the absence of the keys. Cryptography Concepts In the jargon of cryptography, the original information to be protected is called plaintext or cleartext. Encryption is the process of converting plain text into un...

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 ...