Systems and Network Infrastructure Integration

6System and Network Security

“A computer is only secure when it's turned off, and not really even then!”

Bill Gates

– Recalling the basic concepts and challenges of IT security.

– Defining the threats and attacks to which a business's IT system can be exposed.

– Describing various security mechanisms.

– Understanding security management systems and corresponding norms as well as the concept of a security policy.

6.1. Introduction

These days, business IT systems are more and more widely distributed and rely on computer networks to connect the headquarters with its various subsidiaries, as well as teleworkers, retail establishments, etc. This remote access has encouraged the decentralization of businesses and their opening up to the entire world, and has become increasingly sophisticated with new wireless access technologies (GSM, 4/5G, Wimax) and the complete opening up of the Internet network.

Of course, IT networks are necessary for businesses as they enable trade and increase these businesses' competitiveness. Nevertheless, they also carry enormous risks such as the interception of messages, data theft, loss of system and network access, hacking, etc. A wide range of security and safeguarding mechanisms have been introduced in order to reduce the risks faced by businesses as much as possible.

6.2. Definitions, challenges and basic concepts

IT security is made up of all of the technical, organizational, legal and human procedures deployed to maintain and ensure the security ...