The human being's security has been fundamental since the ancestral era and it is much more today in the Internet era.Many
people believe that the Internet is 100% safe. However its use can generate serious problems which unfortunately can only be revealed some time later on.The human being, by nature, has always been worried about the security and safety for himself and for his own goods as well. Nowadays the most important humanity's good is the knowledge and the information generated from it.The Internet has to be early protected from the risky factors such us viruses, hackers and other vulnerabilities, because in some circumstances when the problem occurs, the protection is not effective any more.The International Standard ISO/IEC 17999:2000 is a Code of Practice for background information purposes, which offers general guidelines and voluntary directives, for information security
management. This document focus some major topics concerned with the
organizational security policy and infrastructure; classification and control; personnel, physical and environmental security, communications, operations and business continuity management and compliance.However the ISO/IEC 17999:2000 does not provide definitive or specific material on any security topics. Therefore, the revision of this document is underway and it is also strongly recommended that one would have to supplement this document with other detailed technical guidance and, eventually, other security policies and practices depending upon laws, regulations and even organizational decisions, in order to achieve the appropriate risk mitigation, because no policy or practice, even if implemented exactly as planned, can ensure 100% security in an organisation's information.