CISSP · Question #1251
CISSP Question #1251: Real Exam Question with Answer & Explanation
The correct answer is A: Public key infrastructure (PKI). PKI best ensures transaction integrity to intended recipients by using digital certificates and asymmetric cryptography to verify identities and authenticate parties. It provides a scalable, trusted framework for securing communications.
Question
Which of the following BEST ensures the integrity of transactions to intended recipients?
Options
- APublic key infrastructure (PKI)
- BBlockchain technology
- CPre-shared key (PSK)
- DWeb of trust
Explanation
PKI best ensures transaction integrity to intended recipients by using digital certificates and asymmetric cryptography to verify identities and authenticate parties. It provides a scalable, trusted framework for securing communications.
Common mistakes.
- B. Blockchain technology ensures immutability and distributed record-keeping but is primarily a ledger/consensus mechanism rather than a direct cryptographic framework for verifying the identity of specific intended recipients in general transactions.
- C. Pre-shared keys (PSK) rely on a symmetric secret shared between parties in advance, which does not scale well and lacks the certificate-based identity verification needed to confirm transactions are reaching the intended recipient.
- D. Web of trust is a decentralized model used in PGP where users vouch for each other's keys, but it lacks the structured, hierarchical authority and broad interoperability of PKI, making it less reliable for ensuring integrity to intended recipients at scale.
Concept tested. PKI digital certificates ensuring transaction integrity
Reference. https://learn.microsoft.com/en-us/windows/win32/seccertenroll/public-key-infrastructure
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