Who is responsible for supervision, secure data storage, transport, and implementation of business rules?

The correct answer highlights the role of data custodians, who are tasked with the supervision, secure storage, transport, and implementation of business rules concerning data management. Data custodians play a critical role in ensuring that data is stored securely and that appropriate measures are taken to protect it during transit. They handle the operational aspects of managing data, which includes enforcing policies and protocols to meet security and compliance requirements.

Data custodians typically work in conjunction with other roles, such as data stewards, who may focus more on the accuracy and quality of data rather than its physical security and transport. The data controller, on the other hand, is responsible for making decisions about data usage and determining how data can be processed. In contrast, data processors handle the actual processing of data as instructed by the data controller.

Thus, data custodians are integral in the practical management of data security measures, ensuring that data is safeguarded throughout its lifecycle, from storage to transport, aligning with organizational policies and regulations.