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Why is there a need for data access control? What are the benefits and risks for using Smart Cards and PKI? How do Smart Cards/PKI protect the data's confidentiality, integrity, authentication, and non-repudiation?

Computer Science

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• Why is there a need for data access control?
• What are the benefits and risks for using Smart Cards and PKI?
• How do Smart Cards/PKI protect the data's confidentiality, integrity, authentication, and non-repudiation?