Security is the feature of an operating system that ensures the integrity, confidentiality, and availability of a system and its resources, especially the data and information. Security provides a protection system in case an unauthorized user gains access to the computer system and causes severe damage to the computer or the data stored in it.
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- Authentication: Authentication is the responsibility of the operating system that identifies each user who accesses a system. It then associates the executing programs with those users.
- One-time passwords: A one-time password popularly known as OTP provides additional security alongside normal authentication. OTP is a unique password that a system generates every time a user tries to login into a system or application, so called a one-time password.
- Program threats: The kernel and processes of an OS complete a task as instructed. But if these processes are forced to do malicious tasks, then it is a program threat. Program threats are usually the working of a hacker.
- System threats: System threat is the misuse of the services of a system and its network connections. This puts a user in trouble as it misuses system resources and files.
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Yes, an optimist can be wrong — in the same way that a pessimist can be wrong. But the optimist is far happier. |