Question 80
In the following case: A brokerage encrypts archived customer records while storing decryption keys in the same public folder. Which approach should the ISMS lead most specifically avoid?
Explanation
Correct Answer
Assuming encrypted ciphertext is protected when every employee can obtain its key. This is the most directly harmful practice for the specific issue where a brokerage encrypts archived customer records while storing decryption keys in the same public folder. It could leave the organization facing unauthorized data exposure or permanent loss if keys are compromised or unavailable. Instead, the implementer should implement cryptographic measures with controlled keys and access consistent with information risk. A suitable check is that key access records and tests show only authorized operations can decrypt the intended information.
Incorrect Answers
Assuming supplier audit certificates remove the need for the customer's service oversight. This would be a concern in a different topic, such as when a data processor accepts a hosting agreement without responsibilities for breach reporting or subcontractor access. It is not the defining mistaken approach for the problem described. The error to avoid in this case is assuming encrypted ciphertext is protected when every employee can obtain its key. The linked exposure is unauthorized data exposure or permanent loss if keys are compromised or unavailable. Case: A brokerage encrypts archived customer records while storing decryption keys in the same public folder.
Believing published procedures alone constitute implementation without operational adoption. This would be a concern in a different topic, such as when a SaaS supplier stores approved change rules in a repository that deployment teams never consult. It is not the defining mistaken approach for the problem described. The error to avoid in this case is assuming encrypted ciphertext is protected when every employee can obtain its key. The linked exposure is unauthorized data exposure or permanent loss if keys are compromised or unavailable. Case: A brokerage encrypts archived customer records while storing decryption keys in the same public folder.
Treating password expiration as a substitute for account termination controls. This would be a concern in a different topic, such as when a terminated engineer retains VPN and cloud access weeks after the employment end date. It is not the defining mistaken approach for the problem described. The error to avoid in this case is assuming encrypted ciphertext is protected when every employee can obtain its key. The linked exposure is unauthorized data exposure or permanent loss if keys are compromised or unavailable. Case: A brokerage encrypts archived customer records while storing decryption keys in the same public folder.





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