ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question
During a design review, you propose adding digitally signed transaction receipts that include accurate timestamps and the originator's certificate so customers cannot later deny initiating high-value fund transfers. Which non-functional security property does this control most directly support?
Digitally signing each receipt binds the transaction data to the specific user's private key and timestamp, providing cryptographic proof of origin and integrity. This prevents the user from credibly claiming they did not perform the action, thereby achieving non-repudiation. Confidentiality protects information from disclosure, integrity ensures data is not altered, and auditability focuses on recording events for later examination; none of these alone guarantee that the actor cannot deny the action.
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ISC2 Certified Secure Software Lifecycle Professional (CSSLP)
Secure Software Architecture and Design
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