CISA-KR 문제 276
디지털 서명의 특징은
정답: B
Explanation
A digital signature is a specific type of e-signature that is backed by a digital certificate. A digital certificate is a document that contains the public key of a signer and is issued by a trusted third party called a certificate authority (CA). A digital signature provides proof of the identity of the signer and the integrity of the signed document.
A characteristic of a digital signature is that it is unique to the message. This means that a digital signature cannot be copied from one document to another without being detected as invalid. A digital signature is created by applying a mathematical function called a hashing algorithm to the document. A hashing algorithm produces a fixed-length output called a hash or digest from any input data. The hash is unique to the input data; any change in the input data will result in a different hash.
The signer then encrypts the hash with their private key (a secret key that only they know) to create the digital signature. The encrypted hash is attached to the document as the digital signature. The recipient of the document can verify the digital signature by decrypting it with the signer's public key (a key that is publicly available and matches the private key) to obtain the hash. The recipient then applies the same hashing algorithm to the document to generate another hash. The recipient then compares the two hashes; if they match, it means that the document has not been altered and that the signer is authentic.
Therefore, a digital signature is unique to the message because it is derived from the hash of the message, which is unique to the message.
References:
7: Free Online Signature Generator (Type or Draw) | Signaturely
8: What are digital signatures and certificates? | Acrobat Sign - Adobe
9: eSign PDF with Electronic Signature Free Online - Smallpdf
A digital signature is a specific type of e-signature that is backed by a digital certificate. A digital certificate is a document that contains the public key of a signer and is issued by a trusted third party called a certificate authority (CA). A digital signature provides proof of the identity of the signer and the integrity of the signed document.
A characteristic of a digital signature is that it is unique to the message. This means that a digital signature cannot be copied from one document to another without being detected as invalid. A digital signature is created by applying a mathematical function called a hashing algorithm to the document. A hashing algorithm produces a fixed-length output called a hash or digest from any input data. The hash is unique to the input data; any change in the input data will result in a different hash.
The signer then encrypts the hash with their private key (a secret key that only they know) to create the digital signature. The encrypted hash is attached to the document as the digital signature. The recipient of the document can verify the digital signature by decrypting it with the signer's public key (a key that is publicly available and matches the private key) to obtain the hash. The recipient then applies the same hashing algorithm to the document to generate another hash. The recipient then compares the two hashes; if they match, it means that the document has not been altered and that the signer is authentic.
Therefore, a digital signature is unique to the message because it is derived from the hash of the message, which is unique to the message.
References:
7: Free Online Signature Generator (Type or Draw) | Signaturely
8: What are digital signatures and certificates? | Acrobat Sign - Adobe
9: eSign PDF with Electronic Signature Free Online - Smallpdf
CISA-KR 문제 277
새로운 재무 응용 프로그램을 개발할 때 IS 감사인의 첫 번째 참여는 다음과 같아야 합니다.
정답: B
Explanation
In the development of a new financial application, the IS auditor's first involvement should be in the feasibility study. A feasibility study is a preliminary analysis that evaluates the technical, operational, economic, and legal aspects of a proposed project or system. A feasibility study helps determine whether the project or system is viable, feasible, and desirable for the organization and its stakeholders.
The IS auditor's role in the feasibility study is to provide an independent and objective assessment of the project or system's risks, benefits, costs, and impacts. The IS auditor should also ensure that the feasibility study follows a structured and systematic approach, considers all relevant factors and alternatives, and complies with the organization's policies and standards. The IS auditor should also verify that the feasibility study is documented and communicated to the appropriate decision-makers.
The IS auditor's involvement in the feasibility study is important because it can help:
Identify and mitigate potential risks and issues that could affect the project or system's success Evaluate and justify the project or system's alignment with the organization's strategy, goals, and value proposition Estimate and optimize the project or system's resources, budget, schedule, and quality Assess and enhance the project or system's security, reliability, performance, and usability Ensure that the project or system meets the expectations and requirements of the users and other stakeholders The other three options are not the first involvement of the IS auditor in the development of a new financial application, although they may be part of the subsequent stages of the development process. Control design is the process of defining and implementing controls that ensure the security, integrity, availability, and efficiency of the system. Application design is the process of specifying the functional and technical features of the system. System test is the process of verifying that the system meets the specifications and requirements.
Therefore, feasibility study is the best answer.
References:
[Feasibility Study - ISACA]
[IS Auditing Guideline G13 Performing an IS Audit Engagement - ISACA]
In the development of a new financial application, the IS auditor's first involvement should be in the feasibility study. A feasibility study is a preliminary analysis that evaluates the technical, operational, economic, and legal aspects of a proposed project or system. A feasibility study helps determine whether the project or system is viable, feasible, and desirable for the organization and its stakeholders.
The IS auditor's role in the feasibility study is to provide an independent and objective assessment of the project or system's risks, benefits, costs, and impacts. The IS auditor should also ensure that the feasibility study follows a structured and systematic approach, considers all relevant factors and alternatives, and complies with the organization's policies and standards. The IS auditor should also verify that the feasibility study is documented and communicated to the appropriate decision-makers.
The IS auditor's involvement in the feasibility study is important because it can help:
Identify and mitigate potential risks and issues that could affect the project or system's success Evaluate and justify the project or system's alignment with the organization's strategy, goals, and value proposition Estimate and optimize the project or system's resources, budget, schedule, and quality Assess and enhance the project or system's security, reliability, performance, and usability Ensure that the project or system meets the expectations and requirements of the users and other stakeholders The other three options are not the first involvement of the IS auditor in the development of a new financial application, although they may be part of the subsequent stages of the development process. Control design is the process of defining and implementing controls that ensure the security, integrity, availability, and efficiency of the system. Application design is the process of specifying the functional and technical features of the system. System test is the process of verifying that the system meets the specifications and requirements.
Therefore, feasibility study is the best answer.
References:
[Feasibility Study - ISACA]
[IS Auditing Guideline G13 Performing an IS Audit Engagement - ISACA]
CISA-KR 문제 278
사무실 간에 중요한 데이터를 전송하는 조직의 방법을 검토하는 IS 감사인에게 가장 큰 관심사는 다음 중 무엇입니까?
정답: C
Explanation
The greatest concern to an IS auditor reviewing an organization's method to transport sensitive data between offices is that the method relies exclusively on the use of asymmetric encryption algorithms. Asymmetric encryption algorithms, also known as public key encryption, use two different keys for encryption and decryption: a public key that is shared with anyone who wants to communicate with the sender, and a private key that is kept secret by the sender. Asymmetric encryption algorithms are more secure than symmetric encryption algorithms, which use the same key for both encryption and decryption, but they are also slower and more computationally intensive. Therefore, relying exclusively on asymmetric encryption algorithms may not be efficient or practical for transporting large amounts of sensitive data between offices. A better method would be to use a combination of symmetric and asymmetric encryption algorithms, such as using asymmetric encryption to exchange a symmetric key and then using symmetric encryption to encrypt and decrypt the data.
The other options are not as concerning as option C. The method relying exclusively on the use of public key infrastructure (PKI) is not a concern, because PKI is a system that provides the services and mechanisms for creating, managing, distributing, using, storing, and revoking digital certificates that are based on asymmetric encryption algorithms. PKI enables secure and authenticated communication between parties who do not have a prior trust relationship. The method relying exclusively on the use of digital signatures is not a concern, because digital signatures are a way of verifying the authenticity and integrity of a message or document by using asymmetric encryption algorithms. Digital signatures ensure that the sender cannot deny sending the message or document, and that the receiver can detect any tampering or alteration of the message or document. The method relying exclusively on the use of 128-bit encryption is not a concern, because 128-bit encryption is a level of encryption that uses a 128-bit key to encrypt and decrypt data. 128-bit encryption is considered to be strong enough to resist brute-force attacks by modern computers. References: Asymmetric vs Symmetric Encryption: What are differences?, Public Key Infrastructure (PKI), Digital Signature, What is
128-bit Encryption?
The greatest concern to an IS auditor reviewing an organization's method to transport sensitive data between offices is that the method relies exclusively on the use of asymmetric encryption algorithms. Asymmetric encryption algorithms, also known as public key encryption, use two different keys for encryption and decryption: a public key that is shared with anyone who wants to communicate with the sender, and a private key that is kept secret by the sender. Asymmetric encryption algorithms are more secure than symmetric encryption algorithms, which use the same key for both encryption and decryption, but they are also slower and more computationally intensive. Therefore, relying exclusively on asymmetric encryption algorithms may not be efficient or practical for transporting large amounts of sensitive data between offices. A better method would be to use a combination of symmetric and asymmetric encryption algorithms, such as using asymmetric encryption to exchange a symmetric key and then using symmetric encryption to encrypt and decrypt the data.
The other options are not as concerning as option C. The method relying exclusively on the use of public key infrastructure (PKI) is not a concern, because PKI is a system that provides the services and mechanisms for creating, managing, distributing, using, storing, and revoking digital certificates that are based on asymmetric encryption algorithms. PKI enables secure and authenticated communication between parties who do not have a prior trust relationship. The method relying exclusively on the use of digital signatures is not a concern, because digital signatures are a way of verifying the authenticity and integrity of a message or document by using asymmetric encryption algorithms. Digital signatures ensure that the sender cannot deny sending the message or document, and that the receiver can detect any tampering or alteration of the message or document. The method relying exclusively on the use of 128-bit encryption is not a concern, because 128-bit encryption is a level of encryption that uses a 128-bit key to encrypt and decrypt data. 128-bit encryption is considered to be strong enough to resist brute-force attacks by modern computers. References: Asymmetric vs Symmetric Encryption: What are differences?, Public Key Infrastructure (PKI), Digital Signature, What is
128-bit Encryption?
CISA-KR 문제 279
조직은 최근 규제 기관으로부터 보고 날짜에 중대한 불일치가 있다는 통지를 받았습니다. 예비 조사 결과 불일치가 조직의 데이터 품질 문제로 인해 발생한 것으로 나타났습니다. 경영진은 데이터 품질 팀에 프로그램을 개선하도록 지시했습니다. 감사 위원회는 내부 감사에 프로세스의 고문을 요청했습니다. 관리 문제가 해결되었는지 확인하기 위해 내부 감사에서 가장 먼저 검토해야 하는 데이터 세트는 무엇입니까?
정답: B
Explanation
To ensure that management concerns are addressed, internal audit should recommend that the data quality team review the data reported to the regulatory body first. This is because this data set is the most relevant and critical to the issue that triggered the enhancement of the data quality program. The data reported to the regulatory body should be accurate, complete, consistent, and timely, as any discrepancies could result in fines, penalties, or reputational damage for the organization. Data with customer personal information is important for data quality, but it is not directly related to the regulatory reporting issue. Data supporting financial statements is important for data quality, but it may not be the same as the data reported to the regulatory body. Data impacting business objectives is important for data quality, but it may not be as urgent or sensitive as the data reported to the regulatory body. References:
CISA Review Manual, 27th Edition, pages 404-4051
CISA Review Questions, Answers & Explanations Database, Question ID: 262
To ensure that management concerns are addressed, internal audit should recommend that the data quality team review the data reported to the regulatory body first. This is because this data set is the most relevant and critical to the issue that triggered the enhancement of the data quality program. The data reported to the regulatory body should be accurate, complete, consistent, and timely, as any discrepancies could result in fines, penalties, or reputational damage for the organization. Data with customer personal information is important for data quality, but it is not directly related to the regulatory reporting issue. Data supporting financial statements is important for data quality, but it may not be the same as the data reported to the regulatory body. Data impacting business objectives is important for data quality, but it may not be as urgent or sensitive as the data reported to the regulatory body. References:
CISA Review Manual, 27th Edition, pages 404-4051
CISA Review Questions, Answers & Explanations Database, Question ID: 262
CISA-KR 문제 280
IS 감사인이 지정된 기간 동안 수행할 감사 계획을 준비하고 있습니다. 다음 중 IS 감사인이 가장 먼저 수행해야 하는 활동은 무엇입니까?
정답: D
Explanation
An audit universe is a comprehensive list of all the auditable entities, processes, and activities within an organization. It helps the IS auditor to identify the scope, objectives, and priorities of the audit plan, as well as the resources and methodologies required to conduct the audits. An audit universe can also help the IS auditor to ensure that all the key risks, controls, and regulations are covered by the audit plan, and that there are no gaps or overlaps in the audit coverage.
The first activity that the IS auditor should perform when preparing a plan for audits to be carried out over a specified period is to determine the audit universe. This involves defining the criteria and methods for identifying and categorizing the auditable units, such as by business function, process, system, location, or risk level. The IS auditor should also consult with the management and other stakeholders to obtain their input and expectations for the audit plan. The IS auditor should then document and validate the audit universe, and update it regularly to reflect any changes in the organization's structure, operations, or environment.
The other three activities are also important for preparing an audit plan, but they should be performed after determining the audit universe. Allocating audit resources involves assigning staff, time, budget, and tools to each audit based on their complexity, priority, and availability. Prioritizing risks involves assessing the likelihood and impact of each risk associated with each auditable unit, and ranking them according to their significance and urgency. Reviewing prior audit reports involves analyzing the findings, recommendations, and actions from previous audits related to each auditable unit, and evaluating their current status and relevance.
Therefore, determining the audit universe is the best answer.
References:
Audit Universe - UPDATED 2022 - Examples, Templates & More!
01 February 2023 Audit universe - IIA
An audit universe is a comprehensive list of all the auditable entities, processes, and activities within an organization. It helps the IS auditor to identify the scope, objectives, and priorities of the audit plan, as well as the resources and methodologies required to conduct the audits. An audit universe can also help the IS auditor to ensure that all the key risks, controls, and regulations are covered by the audit plan, and that there are no gaps or overlaps in the audit coverage.
The first activity that the IS auditor should perform when preparing a plan for audits to be carried out over a specified period is to determine the audit universe. This involves defining the criteria and methods for identifying and categorizing the auditable units, such as by business function, process, system, location, or risk level. The IS auditor should also consult with the management and other stakeholders to obtain their input and expectations for the audit plan. The IS auditor should then document and validate the audit universe, and update it regularly to reflect any changes in the organization's structure, operations, or environment.
The other three activities are also important for preparing an audit plan, but they should be performed after determining the audit universe. Allocating audit resources involves assigning staff, time, budget, and tools to each audit based on their complexity, priority, and availability. Prioritizing risks involves assessing the likelihood and impact of each risk associated with each auditable unit, and ranking them according to their significance and urgency. Reviewing prior audit reports involves analyzing the findings, recommendations, and actions from previous audits related to each auditable unit, and evaluating their current status and relevance.
Therefore, determining the audit universe is the best answer.
References:
Audit Universe - UPDATED 2022 - Examples, Templates & More!
01 February 2023 Audit universe - IIA
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