What is a key benefit of using customer-managed encryption keys with cloud key management service (KMS)?
Correct Answer: B
The correct answer isB. Customers retain control over their encryption keys. Usingcustomer-managed encryption keys (CMEK)with a cloudKey Management Service (KMS)allows the customer toretain full control over the encryption keysused to encrypt their data. This is crucial in maintaining data sovereignty, privacy, and compliance with regulatory requirements. Key Benefits of Customer-Managed Encryption Keys: * Key Ownership and Control:Unlike cloud provider-managed keys, CMEK ensures that the customer has full authority over the key's lifecycle, including creation, rotation, and deletion. * Enhanced Security:Customers can enforce strict access controls and audit who accesses the keys. * Compliance:Many regulations (like GDPR or HIPAA) mandate that data owners maintain control over encryption keys. * Data Privacy:Even though the data is stored on the cloud, the provider cannot access unencrypted data without the customer's permission. * Flexibility:Customers can choose when to revoke or rotate keys, which directly impacts data availability and access. Why Other Options Are Incorrect: * A. Bypass the need for encryption:CMEK does not eliminate the need for encryption; it strengthens it by giving customers direct control. * C. Share encryption keys more easily:Sharing encryption keys can increase security risks, and CMEK is designed to restrict, not ease, key sharing. * D. Reduces computational load on the cloud service provider:CMEK does not impact the computational load. It focuses on key management and control rather than reducing processing overhead. Real-World Example: InAWS KMS, using CMEK allows customers to bring their own keys (BYOK) and manage them directly through AWS Key Management Service. Similar practices exist inGoogle Cloud KMSandAzure Key Vault, where customers can generate and control their own encryption keys. Practical Use Case: A healthcare provider using a cloud service to store patient records may use CMEK to ensure that sensitive data is encrypted under keys they control, ensuring compliance with regulations likeHIPAA. References: CSA Security Guidance v4.0, Domain 11: Data Security and Encryption Cloud Computing Security Risk Assessment (ENISA) - Key Management and Encryption Cloud Controls Matrix (CCM) v3.0.1 - Data Protection and Encryption Domain
Question 152
Which layer is the most important for securing because it is considered to be the foundation for secure cloud operations?
Correct Answer: A
Question 153
Which is the most important trust mechanism between cloud service provider and cloud customer?
Correct Answer: B
Contract is the most important document which defines trust and relationship between cloud service provider and the customer.
Question 154
Which standard offers guidelines for information security controls applicable to the provision and use of cloud services?
Correct Answer: A
ISO 270017 provides guidance on the information security aspects of cloud computing. recommending and assisting with the implementation of cloud-specific information security controls supplementing the guidance in ISO/IEC 27002 and other ISO 27k standards.
Question 155
Whose responsibility is to maintain Data Loss Prevention mechanisms in SaaS(Software as a Service) model ?
Correct Answer: B
Although clouds customer is legally responsible for data that he stores on the cloud but Cloud Service Provider has to maintain data loss prevention mechanisms
