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ISACA Certified Information Systems Auditor · Isaca
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Public key infrastructure (PKI) PKI is a comprehensive system that uses asymmetric encryption & digital certificates to secure communications and ensure the confidentiality, integrity, and authenticity of data. why PKI is the best choice for this scenario: 1. Encryption: PKI employs asymmetric encryption 2. Digital certificates: PKI uses digital certificates to verify the identities of participants in the communication. 3. Trust hierarchy: PKI establishes a trust hierarchy with root CAs at the top, followed by intermediate CAs and end-entity certificates. A. Digital signatures Used for data integrity and authentication purposes, ensuring that the data has not been tampered (被竄改) with and verifying the identity of the sender. While they provide important security features, they do not directly protect the confidentiality of data during transit.
B. Public key infrastructure (PKI)