Certifying authority
Commissioner
Subscriber
Controller
Answer is Wrong!
Answer is Right!
The correct answer is: A. Certifying authority.
A certifying authority (CA) is a trusted third party that issues digital signatures. A digital signature is a mathematical algorithm that binds a digital document to a specific person or entity. It is used to verify the authenticity of a document and to ensure that it has not
been tampered with.A CA is responsible for issuing, suspending, and revoking digital signatures. When a CA issues a digital signature, it is essentially vouching for
the identity of the person or entity that is using the signature. If the CA believes that the identity of the person or entity has been compromised, it can suspend or revoke the digital signature.The other options are incorrect because:
- A commissioner is a government official who is responsible for overseeing the activities of CAs. However, they do not have the power to suspend or revoke digital signatures.
- A subscriber is a person or entity who applies for a digital signature from a CA. They do not have the power to suspend or revoke their own digital signature.
- A controller is a person or entity who is responsible for managing the use of digital signatures within an organization. They do not have the power to suspend or revoke digital signatures.