The four controls from the list that the auditor in training should review are:

•A. Confidentiality and nondisclosure agreements: This control requires the organisation to ensure that all employees, contractors, and third parties who have access to sensitive information sign appropriate agreements that oblige them to protect the confidentiality and integrity of such information. This is especially important for an organisation that stores data on behalf of external clients, as it demonstrates its commitment to safeguarding their information assets and complying with their contractual obligations.

•C. Information security awareness, education and training: This control requires the organisation to provide regular and relevant information security awareness, education and training to all employees, contractors, and third parties who have access to the organisation’s information systems and information assets. This is essential for ensuring that they are aware of their roles and responsibilities, the information security policies and procedures, the potential threats and risks, and the best practices for preventing and responding to information security incidents.

•D. Remote working arrangements: This control requires the organisation to establish and implement policies and procedures for managing the information security risks associated with remote working arrangements, such as teleworking, mobile working, or working from home. This includes defining the conditions and requirements for remote working, such as the authorised devices, applications, and networks, the encryption and authentication methods, the backup and recovery procedures, and the reporting and monitoring mechanisms. This is important for an organisation that stores data on behalf of external clients, as it ensures that the information security level is maintained regardless of the location of the workers and the devices they use.

•E. The conducting of verification checks on personnel: This control requires the organisation to conduct appropriate verification checks on the background, qualifications, and references of all employees, contractors, and third parties who have access to the organisation’s information systems and information assets. This is necessary for verifying their identity, suitability, and trustworthiness, and for preventing the hiring of unauthorised or malicious individuals who could compromise the information security of the organisation and its clients.