CISA-KR 문제 281
통제된 애플리케이션 개발 환경에서 가장 중요한 업무 분리는 프로덕션 환경에 변경 사항을 구현하는 사람과 다음 사이에 있어야 합니다.
정답: A
Explanation
In a controlled application development environment, the most important segregation of duties should be between the person who implements changes into the production environment and the application programmer. This segregation of duties ensures that no one person can create and deploy code without proper review, testing, and approval. This reduces the risk of errors, fraud, or malicious code being introduced into the production environment.
The other options are not as important as the segregation between the application programmer and the person who implements changes into production, but they are still relevant for achieving a secure and reliable application development environment. The segregation of duties between the person who implements changes into production and the systems programmer is important to prevent unauthorized or untested changes to system software or configuration. The segregation of duties between the person who implements changes into production and the computer operator is important to prevent unauthorized or uncontrolled access to production data or resources. The segregation of duties between the person who implements changes into production and the quality assurance (QA) personnel is important to ensure independent verification and validation of code quality and functionality.
References:
ISACA CISA Review Manual 27th Edition (2019), page 247
Segregation of Duties in an Agile Environment | AKF Partners3
Separation of Duties: How to Conform in a DevOps World4
In a controlled application development environment, the most important segregation of duties should be between the person who implements changes into the production environment and the application programmer. This segregation of duties ensures that no one person can create and deploy code without proper review, testing, and approval. This reduces the risk of errors, fraud, or malicious code being introduced into the production environment.
The other options are not as important as the segregation between the application programmer and the person who implements changes into production, but they are still relevant for achieving a secure and reliable application development environment. The segregation of duties between the person who implements changes into production and the systems programmer is important to prevent unauthorized or untested changes to system software or configuration. The segregation of duties between the person who implements changes into production and the computer operator is important to prevent unauthorized or uncontrolled access to production data or resources. The segregation of duties between the person who implements changes into production and the quality assurance (QA) personnel is important to ensure independent verification and validation of code quality and functionality.
References:
ISACA CISA Review Manual 27th Edition (2019), page 247
Segregation of Duties in an Agile Environment | AKF Partners3
Separation of Duties: How to Conform in a DevOps World4
CISA-KR 문제 282
통제 자체 평가(CSA) 촉진자의 주요 역할은 다음과 같습니다.
정답: B
Explanation
The primary role of a control self-assessment (CSA) facilitator is to focus the team on internal controls. A CSA facilitator is a person who guides the CSA process and helps the participants to identify, assess, and improve their internal controls. The facilitator does not conduct interviews, report on weaknesses, or provide solutions, as these are the responsibilities of the participants themselves1.
The other options are incorrect because they are not the primary role of a CSA facilitator. Option A, conduct interviews to gain background information, is a preliminary step that may be done by the facilitator or the participants before the CSA session, but it is not the main purpose of the facilitator. Option C, report on the internal control weaknesses, is an outcome of the CSA process that should be done by the participants who own and operate the controls. Option D, provide solutions for control weaknesses, is also an outcome of the CSA process that should be done by the participants who are in charge of implementing the improvements.
References:
ISACA, CISA Review Manual, 27th Edition, 2019, page 2822
ISACA, CISA Review Questions, Answers & Explanations Database - 12 Month Subscription, QID
1066693
PwC, Control Self Assessments4
Workiva, 4 factors of an effective control self-assessment (CSA) program5
The primary role of a control self-assessment (CSA) facilitator is to focus the team on internal controls. A CSA facilitator is a person who guides the CSA process and helps the participants to identify, assess, and improve their internal controls. The facilitator does not conduct interviews, report on weaknesses, or provide solutions, as these are the responsibilities of the participants themselves1.
The other options are incorrect because they are not the primary role of a CSA facilitator. Option A, conduct interviews to gain background information, is a preliminary step that may be done by the facilitator or the participants before the CSA session, but it is not the main purpose of the facilitator. Option C, report on the internal control weaknesses, is an outcome of the CSA process that should be done by the participants who own and operate the controls. Option D, provide solutions for control weaknesses, is also an outcome of the CSA process that should be done by the participants who are in charge of implementing the improvements.
References:
ISACA, CISA Review Manual, 27th Edition, 2019, page 2822
ISACA, CISA Review Questions, Answers & Explanations Database - 12 Month Subscription, QID
1066693
PwC, Control Self Assessments4
Workiva, 4 factors of an effective control self-assessment (CSA) program5
CISA-KR 문제 283
다음 중 RSA 암호화를 사용하여 생성된 디지털 서명이 제공하는 제어 기능을 손상시킬 가능성이 가장 높은 것은 무엇입니까?
정답: D
Explanation
A digital signature is a cryptographic technique that verifies the authenticity and integrity of a message or document, by using a hash function and an asymmetric encryption algorithm. A hash function is a mathematical function that transforms any input data into a fixed-length output value called a digest, which is unique for each input. An asymmetric encryption algorithm uses two keys: a public key and a private key. The public key can be shared with anyone, while the private key must be kept secret by the owner. To create a digital signature, the sender first applies a hash function to the plaintext message to generate a digest. Then, the sender encrypts the digest with their private key to produce the digital signature. To verify the digital signature, the receiver decrypts the digital signature with the sender's public key to obtain the digest. Then, the receiver applies the same hash function to the plaintext message to generate another digest. If the two digests match, it means that the message has not been altered and that it came from the sender. The security of a digital signature depends on the secrecy of the sender's private key. If an attacker obtains the sender's private key, they can create fake digital signatures for any message they want, thus compromising the control provided by the digital signature. Reversing the hash function using the digest is not possible, as hash functions are designed to be one-way functions that cannot be inverted. Altering the plaintext message will result in a different digest after applying the hash function, which will not match with the decrypted digest from the digital signature, thus invalidating the digital signature. Deciphering the receiver's public key is not relevant, as public keys are meant to be publicly available and do not affect the security of digital signatures.
A digital signature is a cryptographic technique that verifies the authenticity and integrity of a message or document, by using a hash function and an asymmetric encryption algorithm. A hash function is a mathematical function that transforms any input data into a fixed-length output value called a digest, which is unique for each input. An asymmetric encryption algorithm uses two keys: a public key and a private key. The public key can be shared with anyone, while the private key must be kept secret by the owner. To create a digital signature, the sender first applies a hash function to the plaintext message to generate a digest. Then, the sender encrypts the digest with their private key to produce the digital signature. To verify the digital signature, the receiver decrypts the digital signature with the sender's public key to obtain the digest. Then, the receiver applies the same hash function to the plaintext message to generate another digest. If the two digests match, it means that the message has not been altered and that it came from the sender. The security of a digital signature depends on the secrecy of the sender's private key. If an attacker obtains the sender's private key, they can create fake digital signatures for any message they want, thus compromising the control provided by the digital signature. Reversing the hash function using the digest is not possible, as hash functions are designed to be one-way functions that cannot be inverted. Altering the plaintext message will result in a different digest after applying the hash function, which will not match with the decrypted digest from the digital signature, thus invalidating the digital signature. Deciphering the receiver's public key is not relevant, as public keys are meant to be publicly available and do not affect the security of digital signatures.
CISA-KR 문제 284
IS 감사자는 조직 내 IT 거버넌스를 개선하기 위한 조치에 대해 조언해 달라는 요청을 받았습니다. 다음 중 가장 좋은 추천은 무엇입니까?
정답: C
Explanation
The best recommendation to improve IT governance within the organization is C. Require executive management to draft IT strategy. IT governance is the process of establishing and maintaining the policies, roles, responsibilities, and accountabilities for managing technology risks within an organization1. One of the key objectives of IT governance is to ensure alignment and integration between technology and business strategies, leading to optimal outcomes and value creation1. Therefore, it is essential that executive management, who are responsible for setting the vision, mission, and goals of the organization, are also involved in drafting the IT strategy that supports and enables them. By requiring executive management to draft IT strategy, the organization can:
Ensure that the IT strategy is consistent and coherent with the business strategy, and reflects the organization's priorities, values, and culture2.
Enhance communication and collaboration between IT and business functions, and foster a shared understanding and commitment to the IT strategy2.
Increase accountability and transparency for IT performance and outcomes, and ensure that IT investments are aligned with the organization's risk appetite and value proposition2.
The best recommendation to improve IT governance within the organization is C. Require executive management to draft IT strategy. IT governance is the process of establishing and maintaining the policies, roles, responsibilities, and accountabilities for managing technology risks within an organization1. One of the key objectives of IT governance is to ensure alignment and integration between technology and business strategies, leading to optimal outcomes and value creation1. Therefore, it is essential that executive management, who are responsible for setting the vision, mission, and goals of the organization, are also involved in drafting the IT strategy that supports and enables them. By requiring executive management to draft IT strategy, the organization can:
Ensure that the IT strategy is consistent and coherent with the business strategy, and reflects the organization's priorities, values, and culture2.
Enhance communication and collaboration between IT and business functions, and foster a shared understanding and commitment to the IT strategy2.
Increase accountability and transparency for IT performance and outcomes, and ensure that IT investments are aligned with the organization's risk appetite and value proposition2.
CISA-KR 문제 285
감사 보고서를 전달한 후 감사 관리자는 감사 중에 증거가 간과되었음을 발견했습니다. 이 증거는 절차적 제어가 실패했을 수 있고 감사 결론과 모순될 수 있음을 나타냅니다. 다음 중 이 감독으로 인해 가장 영향을 받는 위험은 무엇입니까?
정답: C
Explanation
The risk that is most affected by this oversight is audit risk. Audit risk is the risk that the auditor may express an inappropriate opinion or conclusion based on the audit evidence obtained. Audit risk consists of inherent risk, control risk, and detection risk. Inherent risk is the risk that material errors or frauds exist in the audited area before considering the effectiveness of internal controls. Control risk is the risk that the internal controls fail to prevent or detect material errors or frauds. Detection risk is the risk that the auditor fails to identify material errors or frauds using the audit procedures performed. In this case, the auditor has overlooked evidence that could contradict a conclusion of the audit, which increases the detection risk and consequently the audit risk. References:
CISA Review Manual (Digital Version), Chapter 2, Section 2.31
CISA Online Review Course, Domain 1, Module 1, Lesson 32
The risk that is most affected by this oversight is audit risk. Audit risk is the risk that the auditor may express an inappropriate opinion or conclusion based on the audit evidence obtained. Audit risk consists of inherent risk, control risk, and detection risk. Inherent risk is the risk that material errors or frauds exist in the audited area before considering the effectiveness of internal controls. Control risk is the risk that the internal controls fail to prevent or detect material errors or frauds. Detection risk is the risk that the auditor fails to identify material errors or frauds using the audit procedures performed. In this case, the auditor has overlooked evidence that could contradict a conclusion of the audit, which increases the detection risk and consequently the audit risk. References:
CISA Review Manual (Digital Version), Chapter 2, Section 2.31
CISA Online Review Course, Domain 1, Module 1, Lesson 32
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