Security in computer science refers to cyber security which is the protection of the computer systems. Current computer systems face huge risks to get attacked because of the development of the Internet and Internet based devices and our closer relationship with them. The security of the information relates to the happiness of individuals’ life and the functioning of those institutions and infrastructures, it is crucial for us to have solid cyber security system.
To better protect certain computer systems, the software, hardware, data storage, and the people involved are all essential concerns. The software can be designed to be more secure by limiting the accessibility among different parts in the system, adding auto detection, setting up multiple subsystems to block attacks, etc. Besides, it is common to use user accounts access controls and firewalls to help with the security. For the security of hardware, Cryptography is highly useful. The concept of confidentiality, integrity and availability is very crucial to help us identify the storage value of certain data. When it comes to human part, it becomes more complicated. All users accessing to specific network should be trained well to be aware of the security policies, and it is necessary to set up common standards regarding the concept of confidentiality, integrity and availability.