In ML-DSA, any unauthorised modifications to the data can be detected by a receiver during verification. This property is known as _______________.

Question

BlackTom AI · Accepted Answer

Integrity ensures that unauthorised modifications to data can be detected by a receiver during verification. In cryptographic systems (including ML-DSA), integrity is the property that guarantees data has not been altered, intentionally or accidentally, between sender and receiver.

Relevant concepts:
- Cryptographic hash functions and digital signatures produce verifiable outputs tied to message content.
- Verification compares the received data’s computed hash/signature against the transmitted value; a mismatch indicates modification.
- Integrity is distinct from confidentiality (secrecy), availability (accessibility), and non‑repudiation (proof of origin).

Step-by-step reasoning:
1. Sender prepares message M.
2. Sender computes a digest H = hash(M) and often signs H with a private key to produce signature S (in DSA-like schemes).
3. Sender transmits M and S to receiver.
4. Receiver computes H' = hash(M_received) and verifies the signature S using the sender’s public key to recover/confirm H.
5. If H' equals the value authenticated by S, the receiver concludes M_received was not altered; if they differ, the receiver detects an unauthorised modification.

Why this matches the correct answer:
- The ability to detect any unauthorised modification by verification is exactly the definition of integrity. Digital signatures and message digests are standard mechanisms to provide integrity checks in ML-DSA.

Why the other options are incorrect:
- Availability (a) concerns ensuring authorized users can access systems and data when needed, not detecting modifications.
- Non-repudiation (c) prevents a party from denying a sent message; it proves origin and intent rather than detecting alterations.
- Confidentiality (d) ensures data is not disclosed to unauthorized parties; it protects secrecy, not modification detection.

Conclusion: The correct property is integrity, matching the provided answer b.

In ML-DSA, any unauthorised modifications to the data can be detected by a receiver during verification. This property is known as _______________.单项选择题

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