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As an integrity breach. The technical impact of this incident can be categorized as an integrity breach, which refers to the effect of a cloud security incident on the protection of data from unauthorized modification or deletion. Integrity is one of the three security properties of an information system, along with confidentiality and availability.

The incident described in the question involves a cybersecurity criminal finding a vulnerability in an Internet-facing server of an organization, accessing an encrypted file system, and overwriting parts of some files with random data. This is a type of data tampering or corruption attack that affects the accuracy and reliability of the data. The fact that the file system was encrypted does not prevent the integrity breach, as the attacker did not need to decrypt or read the data, but only to overwrite it. The integrity breach can have serious consequences for the organization, such as data loss, data inconsistency, data recovery costs, and loss of trust.

The other options are not correct categories for the technical impact of this incident. Option B, as an availability breach, is incorrect because availability refers to the protection of data and services from disruption or denial, which is not the case in this incident. Option C, as a confidentiality breach, is incorrect because confidentiality refers to the protection of data from unauthorized access or disclosure, which is not the case in this incident. Option D, as a control breach, is incorrect because control refers to the ability to manage or influence the behavior or outcome of a system or process, which is not a security property of an information system.Reference: =

Top Threats Analysis Methodology - CSA1

Top Threats Analysis Methodology - Cloud Security Alliance2

OWASP Risk Rating Methodology | OWASP Foundation3

OEE Factors: Availability, Performance, and Quality | OEE4

The Effects of Technological Developments on Work and Their

The greatest risk associated with hidden interdependencies between cloud services is the lack of visibility over the cloud service providers' supply chain. Hidden interdependencies are the complex and often unknown relationships and dependencies between different cloud services, providers, sub-providers, and customers. These interdependencies can create challenges and risks for the security, availability, performance, and compliance of the cloud services and data.For example, a failure or breach in one cloud service can affect other cloud services that depend on it, or a change in one cloud provider's policy or contract can impact other cloud providers or customers that rely on it.12

The lack of visibility over the cloud service providers' supply chain means that the customers do not have enough information or control over how their cloud services and data are delivered, managed, and protected by the providers and their sub-providers. This can expose the customers to various threats and vulnerabilities, such as data breaches, data loss, service outages, compliance violations, legal disputes, or contractual conflicts. The customers may also face difficulties in monitoring, auditing, or verifying the security and compliance status of their cloud services and data across the supply chain.Therefore, it is important for the customers to understand the hidden interdependencies between cloud services and to establish clear and transparent agreements with their cloud providers and sub-providers regarding their roles, responsibilities, expectations, and obligations.3

When an organization is moving to the cloud, responsibilities are shared based upon the cloud service provider's model and accountability is maintained. This means that the organization remains accountable for the security and compliance of its data and applications in the cloud, even if some of the security responsibilities are delegated to the cloud service provider (CSP). The organization cannot transfer or avoid its accountability to the CSP or any other third party, as it is ultimately responsible for its own business outcomes, legal obligations, and reputation. Therefore, the organization must understand the shared responsibility model and which security tasks are handled by the CSP and which tasks are handled by itself.The organization must also monitor and audit the CSP's performance and security, and mitigate any risks or issues that may arise12.

Shared responsibility in the cloud - Microsoft Azure

Understanding the Shared Responsibilities Model in Cloud Services - ISACA

According to the CSA website, the primary purpose of the Open Certification Framework (OCF) for the CSA STAR program is to provide global, accredited, trusted certification of cloud providers1The OCF is an industry initiative to allow global, trusted independent evaluation of cloud providers.It is a program for flexible, incremental and multi-layered cloud provider certification and/or attestation according to the Cloud Security Alliance's industry leading security guidance and control framework2The OCF aims to address the gaps within the IT ecosystem that are inhibiting market adoption of secure and reliable cloud services, such as the lack of simple, cost effective ways to evaluate and compare providers' resilience, data protection, privacy, and service portability2The OCF also aims to promote industry transparency and reduce complexity and costs for both providers and customers3

The other options are not correct because:

Option A is not correct because facilitating an effective relationship between the cloud service provider and cloud client is not the primary purpose of the OCF for the CSA STAR program, but rather a potential benefit or outcome of it. The OCF can help facilitate an effective relationship between the provider and the client by providing a common language and framework for assessing and communicating the security and compliance posture of the provider, as well as enabling trust and confidence in the provider's capabilities and performance. However, this is not the main goal or objective of the OCF, but rather a means to achieve it.

Option B is not correct because ensuring understanding of true risk and perceived risk by the cloud service users is not the primary purpose of the OCF for the CSA STAR program, but rather a possible implication or consequence of it. The OCF can help ensure understanding of true risk and perceived risk by the cloud service users by providing objective and verifiable information and evidence about the provider's security and compliance level, as well as allowing comparison and benchmarking with other providers in the market. However, this is not the main aim or intention of the OCF, but rather a result or effect of it.

Option D is not correct because enabling the cloud service provider to prioritize resources to meet its own requirements is not the primary purpose of the OCF for the CSA STAR program, but rather a potential advantage or opportunity for it. The OCF can enable the cloud service provider to prioritize resources to meet its own requirements by providing a flexible, incremental and multi-layered approach to certification and/or attestation that allows the provider to choose the level of assurance that suits their business needs and goals. However, this is not the main reason or motivation for the OCF, but rather a benefit or option for it.

According to the ISACA Cloud Auditing Knowledge Certificate Study Guide, the auditor should review the relationship between the cloud service provider and its service provider to help direct and estimate the level of effort and analysis the auditor should apply1. The auditor should understand the nature and scope of the services provided by the service provider, the contractual obligations and service level agreements, the security and compliance requirements, and the monitoring and reporting mechanisms. The auditor should also assess the risks and controls associated with the service provider, and determine if additional audit procedures are needed to obtain sufficient assurance.

The other options are not the best approach for the auditor. Option A is too strict and might not be feasible or necessary, depending on the type and level of services provided by the service provider. Option C is too lax and might overlook significant risks and gaps in the cloud service. Option D is too narrow and might ignore the impact of the service provider on the cloud customer's business context.Reference:

ISACA Cloud Auditing Knowledge Certificate Study Guide, page 13-14.