According to the CRISC Review Manual (Digital Version), the first course of action when a risk practitioner discovers several key documents detailing the design of a product currently in development have been posted on the Internet is to invoke the established incident response plan, which is a set of policies, procedures, and resources that enable the organization to respond to and recover from an incident that affects the confidentiality, integrity, or availability of its IT assets and processes. Invoking the incident response plan helps to:
* Contain and isolate the incident and prevent further damage or loss
* Identify and analyze the source, cause, and impact of the incident
* Eradicate and eliminate the incident and restore normal operations
* Communicate and coordinate the incident response activities and roles with the relevant stakeholders, such as the business owner, the risk owner, the senior management, and the external parties
* Learn and improve from the incident and update the incident response plan and the risk register References = CRISC Review Manual (Digital Version), Chapter 4: IT Risk Monitoring and Reporting, Section 4.1: IT Risk Monitoring, pp. 219-2201

A key control indicator (KCI) is a metric that provides information on the extent to which a given control is meeting its intended objectives in terms of loss prevention, reduction, etc. A KCI should have an explicit relationship to both the specific control and the specific risk against which the control has been implemented.
For risk related to IT infrastructure failure, a possible control is to have a recovery plan that can restore the critical IT services and minimize the impact of the failure. A KCI that can measure the effectiveness of this control is the number of successful recovery plan tests, which indicates how well the recovery plan can be executed in a real scenario. The higher the number of successful tests, the lower the risk of IT infrastructure failure. Therefore, this is the best KCI among the given options. References =
* Integrating KRIs and KPIs for Effective Technology Risk Management
* Key Control Indicator (KCI) - CIO Wiki
* Infrastructure Issues: Understanding and Mitigating Risks

MFA significantly increases security by requiring multiple authentication factors, making it harder for attackers to access digital wallets fraudulently. This is a cornerstone of Access Control Measures in risk mitigation.

A risk assessment with stakeholders is the best course of action because it will help the risk practitioner to evaluate the value and risk of the third-party blockchain integration platform in relation to the organization's objectives, risk appetite, and risk tolerance. A risk assessment will also help to identify and prioritize the risks and opportunities associated with the platform, and to develop appropriate risk responses and controls.
References: The answer is based on the following sources:
*CRISC Review Manual, 7th Edition, Chapter 2: IT Risk Assessment, pages 75-761
*CRISC Review Questions, Answers & Explanations Database, 12 Month Subscription, Question ID: QID-
10012

Role of the Control Owner:
* The control owner is responsible for the design, implementation, and maintenance of a specific control.
* They have detailed knowledge of the control's purpose, its intended functionality, and its operational context within the organization.
Responsibility for Remediation:
* When a penetration testing team discovers an ineffectively designed access control, it is the control owner's responsibility to ensure the design gap is remediated.
* The control owner must assess the findings, determine the root cause of the ineffectiveness, and take necessary actions to redesign or enhance the control to address the identified weaknesses.
Steps to Remediate Control Design Gap:
* Assess the Findings: Understand the specific issues identified by the penetration testing team.
* Redesign the Control: Modify the control design to address the identified gaps and ensure it meets security requirements.
* Implement Changes: Apply the redesigned control and test its effectiveness.
* Continuous Monitoring: Regularly review the control to ensure it remains effective over time.
Comparing Other Roles:
* Risk Owner: Manages overall risk but does not directly handle control design.
* IT Security Manager: Oversees the security posture but delegates specific control responsibilities to control owners.
* Control Operator: Operates the control but is not responsible for its design or remediation.
References:
* The CRISC Review Manual emphasizes the control owner's responsibility in maintaining and improving control effectiveness (CRISC Review Manual, Chapter 3: Risk Response and Mitigation, Section 3.7 Control Design and Selection).