Question 780
At Timberline Foods, the supply-chain assurance team is conducting a coordinated processing-plant assessment under requirements for food safety and secure logistics. Following the approved correction, auditors require proof that: A database uses a fixed initialization vector for repeated encryption of confidential records with a mode that requires unique nonces. Which result BEST demonstrates successful remediation?
Explanation
Correct Answer
A test harness confirms nonce uniqueness and altered ciphertext fails authentication. The observable result demonstrates that the documented condition, A database uses a fixed initialization vector for repeated encryption of confidential records with a mode that requires unique nonces. has been addressed. The planned remediation is: Use an authenticated encryption scheme with safely generated non-reused nonces and protected keys. This is a stronger validation than a saved ticket or unverified claim by Timberline Foods.
Incorrect Answers
The device rotates to the new key and a verified authorized recovery procedure restores access successfully. That observation would verify another scenario: An administrator rotates a disk-encryption key without preserving recovery policy and makes a test laptop unable to unlock its data. The corrective step for that other scenario is: Plan protected recovery escrow and test key lifecycle operations before enforcing device-wide rotation. But Timberline Foods is evaluating: A database uses a fixed initialization vector for repeated encryption of confidential records with a mode that requires unique nonces. The necessary outcome is: A test harness confirms nonce uniqueness and altered ciphertext fails authentication.
An unprivileged user cannot retrieve key material even when able to read ordinary application configuration. That observation would verify another scenario: An application encrypts customer data but stores the encryption key in the same publicly readable configuration file. The corrective step for that other scenario is: Protect encryption keys with a managed key vault or HSM and enforce separate access and rotation controls. But Timberline Foods is evaluating: A database uses a fixed initialization vector for repeated encryption of confidential records with a mode that requires unique nonces. The necessary outcome is: A test harness confirms nonce uniqueness and altered ciphertext fails authentication.
The client rejects an untrusted or wrong-name test certificate while accepting the legitimate service certificate. That observation would verify another scenario: A service presents a certificate signed by an unknown private CA and the client accepts it without checking trust and hostname. The corrective step for that other scenario is: Validate the full certificate chain, identity and validity interval against trusted roots rather than ignoring verification errors. But Timberline Foods is evaluating: A database uses a fixed initialization vector for repeated encryption of confidential records with a mode that requires unique nonces. The necessary outcome is: A test harness confirms nonce uniqueness and altered ciphertext fails authentication.