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'Login-ID and Password' mechanism is implemented in an operating system to ensure which of the following aspects of security ?

  • A.Confidentiality
  • B.Integrity
  • C.Authentication
  • D.Authorization

Answer: C

Login-ID and password ensure Authentication.

Authentication verifies that users are who they claim to be. A login ID identifies the user, and the password, something only that user should know, proves the claim.

Authorisation is the next step, deciding what an authenticated user may do. Confidentiality (keeping data secret) and integrity (keeping it unaltered) are protected by access control and encryption, which depend on authentication but are not what the login mechanism itself provides.

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