GOALS OF NETWORK SECURITY

Confidentiality

The first goal of Network Security is "Confidentiality". The function of "Confidentiality" is in protecting precious business data (in storage or in motion) from unauthorized persons. Confidentiality part of Network Security makes sure that the data is available OLNY to intended and authorized persons. Access to business data should be only for those individuals who are permitted to use that data.

Confidentiality can be archived by following:

• Encryption
• Access control

Integrity

The second goal of Network Security is "Integrity". Integrity aims at maintaining and assuring the accuracy and consistency of data. The function of Integrity is to make sure that the date is accurate and reliable and is not changed by unauthorized persons or hackers. The data received by the recipient must be exactly same as the data sent from the sender, without change in even single bit of data.

Integrity can be archived by following:

• Hashing
• Digital Signatures
• Certificates
• Non-repudiation

Availability

The third goal of network security is "Availability". The function of "Availability" in Network Security is to make sure that the Data, Network Resources or Network Services are continuously available to the legitimate users, whenever they require it.

An example of integrity checks is balancing a batch of transactions to make sure that all the information is present and accurately accounted for.

Availability can be archived by following:

Redundancy : Redundancy is a concept that is mainly based on keeping things up and running in one's organization even with the absence of one important component. 

Common challenges to availability:

Denial of service (DoS)
Loss of information (fires, floods, storms, or earthquakes) 
Equipment failures during normal use

Safety

Safety is also a very important aspect not only in an organization but also some other environments such as at home. For optimal assurance of safety, there has to be some properly set strategies that are to be followed if proper safety is to be effective. Safety does not only entail being away from danger but also having the capability to prevent unauthorized access of a particular resource or facility. Safety should also include proper monitoring of all the activities happening in a particular area or vicinity.

• Fencing
• Lighting
• Locks
• CCTV
• Escape Plan 
• Drills