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問題 #44
The hash function supports data in transit by ensuring:
答案：C
解題說明：
A cryptographic hash function supports data in transit primarily by providing integrity assurance. When a sender computes a hash (digest) of a message and the receiver recomputes the hash after receipt, the two digests should match if the message arrived unchanged. If the message is altered in any way while traveling across the network-whether by an attacker, a faulty intermediary device, or transmission errors-the recomputed digest will differ from the original. This difference is the key signal that the message was modified in transit, which is what option B expresses. In practical secure-transport designs, hashes are typically combined with a secret key or digital signature so an attacker cannot simply modify the message and generate a new valid digest. Examples include HMAC for message authentication and digital signatures that hash the content and then sign the hash with a private key. These mechanisms provide integrity and, when keyed or signed, also provide authentication and non-repudiation properties.
Option A is more specifically about authentication of origin, which requires a keyed construction such as HMAC or a signature scheme; a plain hash alone cannot prove who sent the message. Option C is incorrect because keys are not "converted" from public to private. Option D relates to confidentiality, which is provided by encryption, not hashing. Therefore, the best answer is B because hashing enables detection of message modification during transit.
問題 #45
Compliance with regulations is generally demonstrated through:
答案：C
解題說明：
Regulatory compliance is generally demonstrated through independent audits because regulators, customers, and partners typically require objective evidence that required controls exist and operate effectively. An independent audit is performed by a qualified party that is not responsible for running the controls being assessed, which strengthens credibility and reduces conflicts of interest. Cybersecurity and governance documents describe audits as a formal method to verify compliance against defined criteria such as laws, regulations, contractual obligations, or control frameworks. Auditors review policies and procedures, inspect system configurations, sample access and change records, evaluate logging and monitoring, test incident response evidence, and validate that controls are consistently performed over time. The outcome is usually a report, attestation, or findings with remediation plans-artifacts commonly used to prove compliance.
A Board or executive review supports governance and oversight, but it does not, by itself, provide independent verification that controls are functioning. QA testing focuses on product quality and functional correctness; it may include security testing but does not typically satisfy regulatory evidence requirements for ongoing operational controls. Penetration testing is valuable for identifying exploitable weaknesses, yet it is a point-in-time technical exercise and does not comprehensively demonstrate compliance with procedural, administrative, and operational requirements such as access governance, retention, training, vendor oversight, and continuous monitoring. Therefore, independent audits are the standard mechanism to demonstrate compliance in a defensible, repeatable way.
問題 #46
Which of the following is a cybersecurity risk that should be addressed by business analysis during solution development?
答案：C
解題說明：
Business analysis is responsible for ensuring the solution is correctly understood in terms of business purpose, process flows, data handling, user roles, integrations, and non-functional requirements such as security and privacy. If the solution is not understood well enough, security risks will be missed early, leading to gaps that are expensive and difficult to correct later. This is why option C is the best answer: inadequate understanding prevents reliable identification of threats, sensitive data paths, trust boundaries, and misuse cases during requirements and design stages.
Cybersecurity documents emphasize "security by design" and "shift-left" practices, meaning risks should be identified and addressed before build and test. Business analysis contributes by eliciting and documenting security requirements, clarifying data classification and retention needs, defining user access and privilege expectations, identifying regulatory and policy constraints, and ensuring interfaces and third-party dependencies are known and assessed. BA also supports threat modeling inputs by providing accurate context about actors, workflows, and data movement, which are essential for identifying where controls like authentication, authorization, logging, encryption, and validation must exist.
Other options align to different roles or stages: budgets are governance and project management constraints, QA limitations are testing risks, and coding-introduced vulnerabilities are primarily addressed through secure coding standards, code review, and developer practices. BA's key cybersecurity risk is incomplete understanding that prevents correct security requirements and risk identification.
問題 #47
Which organizational area would drive a cybersecurity infrastructure Business Case?
答案：A
問題 #48
Which of the following factors is most important in determining the classification of personal information?
答案：B
解題說明：
Personal information is classified primarily based on the harm that could result from unauthorized disclosure, which maps directly to the confidentiality objective. Cybersecurity and privacy governance frameworks treat personal data as sensitive because exposure can lead to identity theft, fraud, discrimination, personal safety risks, and loss of privacy. Organizations also face regulatory penalties, contractual consequences, and reputational damage when personal data is disclosed without authorization. For this reason, when determining classification, the first and most influential question is typically: "What is the impact if this data becomes known to someone who should not have it?" That impact assessment drives the required protection level and handling rules.
Confidentiality-focused controls then follow from the classification decision, including least privilege and role-based access, strong authentication, encryption at rest and in transit, secure key management, data loss prevention where appropriate, logging and monitoring of access to sensitive records, and strict sharing/transfer procedures.
Integrity and availability matter for personal information, but they are usually secondary in classification decisions. Integrity affects trustworthiness and correctness (for example, incorrect medical or payroll data), and availability affects the ability to access records when needed. However, the defining sensitivity of personal information is that it must not be disclosed improperly. "Accessibility" is not a core security objective used in standard classification models; it is an operational usability concept that is managed through access design after sensitivity is established.
問題 #49
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