Luis Miguel

Encryption and science and art of writing messages in encrypted form or in code. And part of a field of study that deals with secret communications, used, among other purposes, to:

The term is used to describe a method of attack, where someone makes use of persuasion, often abusing the trust of naivety or User to obtain information that can be used to gain unauthorized access to computers or information.

A password (password) on the Internet or any computer system, serves to authenticate the User, or is used in the process of verifying the identity of the User, ensuring that this is who he claims to be.

A computer (or computer system) and said sure if it meets the three basic requirements related to the resources that comprise: confidentiality, integrity and availability.

The software desenvolvedores in the decade of 70 frequently they shared their programs in a similar way to the beginnings of the free software. In the end of the same decade, the companies began to impose restrictions to the users with the use of contracts of software license.

Free software, according to the definition created by Free Software Foundation is any computer program that can be used, copied, studied and redistributed with some restrictions.