Question 700
An ISMS reviewer examines the following case: An insurer transfers claim summaries among partners, but the access model permits unrelated brokers to read them. What evidence would most directly show that the response is operating effectively?
Explanation
Correct Answer
Access tests show unrelated users cannot retrieve customer records and authorized users still can. This is the relevant test result for the scenario in which an insurer transfers claim summaries among partners, but the access model permits unrelated brokers to read them. It verifies the action to restrict information disclosure to identities and roles approved for the relevant customer records. The corresponding operating design is to set explicit authorization rules and protect sensitive records in transit and at rest where appropriate. The result should rule out the error of treating a private network connection as proof that every connected user is authorized.
Incorrect Answers
An obligation trace shows each relevant requirement has an accountable implementation and review owner. This may be a useful result for applicable interested-party requirements in another case, such as when a supplier overlooks an insurer's security conditions that govern its processing contract. It does not establish effectiveness of the controls necessary for the described problem. The relevant evidence is that access tests show unrelated users cannot retrieve customer records and authorized users still can. Case: An insurer transfers claim summaries among partners, but the access model permits unrelated brokers to read them.
A controlled failure test meets the required recovery time and returns an accurate usable service. This may be a useful result for availability and recovery dependency in another case, such as when a hospital stores treatment schedules in one database whose failure stops clinicians retrieving appointments. It does not establish effectiveness of the controls necessary for the described problem. The relevant evidence is that access tests show unrelated users cannot retrieve customer records and authorized users still can. Case: An insurer transfers claim summaries among partners, but the access model permits unrelated brokers to read them.
Scope review shows critical information flows and interfaces are addressed and exclusions explained. This may be a useful result for risk-driven scope and context in another case, such as when a subsidiary narrows its ISMS boundary to one office although data processing extends to shared cloud services. It does not establish effectiveness of the controls necessary for the described problem. The relevant evidence is that access tests show unrelated users cannot retrieve customer records and authorized users still can. Case: An insurer transfers claim summaries among partners, but the access model permits unrelated brokers to read them.





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