Which security service is served by the process of encryption plaintext with the sender-s private key and decrypting cipher text with the sender-s public key?
A. Confidentiality
B. Integrity
C. Identification
D. Availability
Which security service is served by the process of encryption plaintext with the sender-s private key and decrypting cipher text with the sender-s public key?
A. Confidentiality
B. Integrity
C. Identification
D. Availability
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Authenticity and non-repudiation is BEST answer (Answer “C”)
Anyone can decrypt the sender’s cipher-text with sender’s public key, so this services is not to provide confidentiality.
Reference: CISSP All-in-One Exam Guide, Eighth Edition, 8th Edition page 371
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