Cryptography as the important thing

Cryptography did not end World War II and the Engima machine, on the contrary, today the system to prevent certain information public such as bar codes or digital signatures. Modern applications we owe to Claude Shannon in 1949 with Warren Weaver developed Mathematical Theory of Communication, a book indgaba the importance of mathematics as part of the communication channel.

Until the 70's did not turn out cryptography to light thanks to IBM began developing electronic communication systems to increase the safety of different banks and financial institutions.

The system was encrypted with symmetric algorithm, ie, both sender and receiver using the same key, which could cause problems because if someone stole the translation system of cryptography could read both the sender and the receiver . The key exchange was a difficult time and that was the basis of this type of cryptography.

He later developed the asymmetric key so that there would be two different keys and are based on mathematics, as we predicted Claude Shannon. There are two keys, one public and one private, so that the public travels freely and although anyone can read private decrypt the hard part. In addition, the public key is used to attest to the person who sent the message. If the sender's public key does not match the message they are trying to deceive.

The mathematical basis of asymmetric cryptography algorithms is the one-way function that takes a lot of computing power to decode but not to create an account.