Yes, I agree that digital signatures are the best way to protect the data in the date in question. A digital signature is mathematical technique used to validate the authenticity and integrity of a massage. Digital signature is far more inherent security. It is built to solve problems of tempering and impersonation of digital documents. It allows the authorized user to have authentic right, and the unauthorized person is denied access.
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CRL (certificate revocation list)" is the appropriate answer.
Explanation:
A collection of such subscriber bases containing accreditation or certification status combined with the validation, revocation, or outdated certification within each final customer is known as CRL.
Only certain subscribing workstations with a certain underlying cause authentication system should have been duplicated.