Question

Given below are two statements.
Assertion (A):
Security has services like confidentiality, integrity, authentication, access control, et
C.
Reason (R):
Encryption, digital signature, MD5 and secure hash algorithm may be used for authentication and confidentiality, et
C.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Security services describe what is required, while security mechanisms describe how those services are achieved.

Answer 1

The Correct Option is A

Concept:
Computer security provides different services such as confidentiality, integrity, authentication and access control.

Step 1: Check Assertion.
Security services include: \[ \text{Confidentiality, Integrity, Authentication, Access Control} \] So, Assertion is correct.

Step 2: Check Reason.
Security mechanisms such as encryption, digital signatures and hash algorithms are used to provide these security services. For example: \[ \text{Encryption} \rightarrow \text{Confidentiality} \] \[ \text{Digital signature} \rightarrow \text{Authentication and Integrity} \] \[ \text{Hash algorithm} \rightarrow \text{Integrity checking} \] Thus, Reason is also correct and explains how security services can be provided. \[ \therefore \text{Correct Answer is (A)} \]