What is Computer Security ?
Computer security, also known as cybersecurity or IT security, is the protection of information systems from theft or damage to the hardware, the software, and to the information on them, as well as from disruption or misdirection of the services they provide.
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In simple terms preventing someone to access your information is computer security.The prevention of or protection against access to information by unauthorized recipients, and the unauthorized destruction of or alteration of information.
Computer security is often associated with three core areas, summarized with the CIA acronym: Confidentiality (ensuring that information is not accessed by unauthorized individuals; Integrity (ensuring that information is not altered by unauthorized individuals in a way not detectable by authorized users); and Authentication (ensuring that users are the individuals they say they are).
To prevent crackers from accessing a computer system, computer security individuals need to block noncritical incoming ports on the firewalls. Moreover, the ports remaining open need to be protected by patching the services utilizing those ports—email, Web services, and FTP.
The CERT Website lists updated vulnerability data about services that may be running, so this listing should be consulted regularly. Also, to assess whether a cracker is utilizing tools to access the system, computer security individuals should use logging tools that record port scans, failed login attempts, and fingerprinting. Snort, a freeware Intrusion Detection System (IDS), can detect intrusions that it is aware of and properly understands, but is unable to prevent them. Furthermore, the logfiles need to be reviewed to determine which machines appear to be probing the system.
Why is Computer Security Important to you and your company?
Computer Security allows the University to carry out its mission by:
- Enabling people to carry out their jobs, education, and research
- Supporting critical business process
- Protecting personal and sensitive information
Why do I need to learn about Computer Security? Isn't this just an I.T. problem?
Good Security Standards follow the "90 / 10" Rule:
- 10% of security safeguards are technical.
- 90% of security safeguards rely on the computer user ("YOU") to adhere to good computing practices
Example: The lock on the door is the 10%. You remembering to lock the lock, checking to see if the door is closed, ensuring others do not prop the door open, keeping control of the keys, etc. is the 90%. You need both parts for effective security.