Unapproved changes to firewall rules can lead tocritical security vulnerabilitiesordisruptions to business services, representing adirect impact on the business. This is more critical than documentation or governance concerns.
Reference:CRISC Manual - Domain 1, Slide 120-122; Domain 3, Slide 312-314

The most important characteristic of a key risk indicator (KRI) to enable decision-making is illustrating changes in risk trends, as it provides a clear and timely indication of the direction and magnitude of the risk level and exposure, and enables the stakeholders to take proactive and appropriate actions to address the risk.
The other options are not the most important characteristics, as they are more related to the monitoring, measurement, or identification of the risk, respectively, rather than the illustration of the risk trends. References = CRISC Review Manual, 7th Edition, page 110.

The greatest risk to change control in business application development over the complete life cycle is the introduction of requirements that have not been approved. Requirements are the specifications or expectations of the business users or stakeholders for the application, such as the features, functions, or performance1. Change control is the process of identifying, evaluating, approving, and implementing changes to the application, such as the design, code, or configuration2. By introducing requirements that have not been approved, the organization can face significant risks, such as:
* Scope creep, which is the uncontrolled or unauthorized expansion of the project scope, and can result in increased costs, delays, or errors3.
* Quality issues, which can affect the reliability, usability, or security of the application, and can lead to defects, failures, or breaches4.
* Stakeholder dissatisfaction, which can arise from the mismatch or inconsistency between the delivered application and the expected application, and can cause complaints, disputes, or litigation5.
The other options are not the greatest risk to change control, because:
* Emphasis on multiple application testing cycles is not a risk, but rather a benefit or a best practice for change control, as it can help to ensure that the application meets the requirements and standards, and that the changes are effective and efficient.
* Lack of an integrated development environment (IDE) tool is a challenge, but not a risk, for change control, as it can affect the productivity, collaboration, or integration of the developers, and can cause difficulties or inefficiencies in the development process. However, it does not directly affect the requirements or the quality of the application, and it can be overcome by using other tools or methods.
* Bypassing quality requirements before go-live is a risk, but not the greatest risk, for change control, as it can compromise the quality or performance of the application, and can expose the organization to errors, failures, or breaches. However, it is less likely or frequent than introducing requirements that have not been approved, and it can be detected or prevented by using quality assurance or quality control techniques.
References
* Requirements - CIO Wiki
* Change Control - CIO Wiki
* Scope Creep - CIO Wiki
* Quality - CIO Wiki
* Stakeholder Management - CIO Wiki
* [Software Testing - CIO Wiki]
* [Integrated Development Environment (IDE) - CIO Wiki]
* [Quality Requirements - CIO Wiki]
* [Software Development Life Cycle - CIO Wiki]

An IT license audit is a process that verifies the compliance of the IT software and hardware assets with the licensing agreements and regulations. An IT license audit can reveal the existence of unlicensed copies of software, which can expose the enterprise to legal, financial, and reputational risks. The best course of action in such a situation is to report the issue to management so that appropriate action can be taken. Management can then decide on the most suitable risk response strategy, such as procuring the necessary licenses, uninstalling the unlicensed software, or negotiating with the software vendor. Reporting the issue to management can also help to prevent further violations, identify the root causes, and implement corrective and preventive measures. The other options are not the best course of action, as they may not address the issue effectively, efficiently, or ethically. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 4, Section 4.2.1.1, pp. 156-157.

Nonrepudiation is the ability to prevent or deny the parties involved in an electronic transaction from disputing or rejecting the validity or authenticity of the transaction. Nonrepudiation ensures that the parties cannot claim that they did not send or receive the transaction, or that the transaction was altered or tampered with.
The tool that helps ensure compliance with a nonrepudiation policy requirement for electronic transactions is digital signatures, which are the electronic equivalents of handwritten signatures that are used to verify the identity and integrity of the sender and the content of the transaction. Digital signatures are generated by applying a cryptographic algorithm to the transaction, using the sender's private key, which is a secret and unique code that only the sender knows and possesses. The digital signature can be verified by the receiver or any third party, using the sender's public key, which is a code that is publicly available and corresponds to the sender's private key. The digital signature can prove that the transaction was sent by the sender, and that the transaction was not altered or tampered with during the transmission.
The other options are not the tools that help ensure compliance with a nonrepudiation policy requirement for electronic transactions, because they do not provide the same level of verification and validation that digital signatures provide, and they may not be sufficient or effective to prevent or deny the parties from disputing or rejecting the transaction.
Encrypted passwords are the passwords that are converted into a secret or unreadable form, using a cryptographic algorithm, to protect them from unauthorized access or disclosure. Encrypted passwords can help to ensure the confidentiality and security of the passwords, but they are not the tools that help ensure compliance with a nonrepudiation policy requirement for electronic transactions, because they do not verify the identity and integrity of the sender and the content of the transaction, and they may not prevent or deny the parties from disputing or rejecting the transaction.
One-time passwords are the passwords that are valid or usable for only one session or transaction, and that are randomly generated or derived from a dynamic factor, such as time, location, or device. One-time passwords can help to enhance the security and authentication of the parties involved in the transaction, but they are not the tools that help ensure compliance with a nonrepudiation policy requirement for electronic transactions, because they do not verify the identity and integrity of the sender and the content of the transaction, and they may not prevent or deny the parties from disputing or rejecting the transaction.
Digital certificates are the electronic documents that contain the information and credentials of the parties involved in the transaction, such as their name, public key, expirationdate, etc., and that are issued and signed by a trusted authority or entity, such as a certificate authority or a digital signature provider. Digital certificates can help to establish and confirm the identity and trustworthiness of the parties involved in the transaction, but they are not the tools that help ensure compliance with a nonrepudiation policy requirement for electronic transactions, because they do not verify the identity and integrity of the sender and the content of the transaction, and they may not prevent or deny the parties from disputing or rejecting the transaction. References = ISACA, CRISC Review Manual, 7th Edition, 2022, pp. 40-41, 47-48, 54-55, 58-59, 62-63 ISACA, CRISC Review Questions, Answers & Explanations Database, 2022, QID 197 CRISC Practice Quiz and Exam Prep