Public Key Infrastructure (PKI) supports change management by securing messages (e.g., approvals, updates).Non-repudiation, provided via digital signatures, ensures a sender cannot deny sending a message, critical for auditability in change processes.
Option A:Correct-PKI's digital signatures ensure non-repudiation.
Option B:Confidentiality (via encryption) is a PKI feature but less tied to change management's focus on accountability.
Option C:Delivery receipts are not aPKI function; they're protocol-specific (e.g., SMTP).
Option D:Attestation relates to verifying attributes, not a direct PKI message capability.