Explanation:
According to Article 5 of the GDPR, personal data must be processed in a manner that ensures appropriate security of the personal data, including protection against unauthorised or unlawful processing and against accidental loss, destruction or damage, using appropriate technical or organisational measures (`integrity and confidentiality')1. The company's decision to install cameras in the entrance of the building, hallways and offices may violate this principle, as it may expose the personal data of the employees and visitors to unnecessary risks, such as hacking, misuse or disclosure. Moreover, the company must also comply with the other principles of data processing, such as lawfulness, fairness and transparency, purpose limitation, data minimisation, accuracy and storage limitation. The company must have a legitimate and specific purpose for installing the cameras, and must inform the data subjects about the processing of their personal data. The company must also ensure that the cameras collect only the minimum amount of data necessary for the purpose, and that the data are accurate and kept for no longer than necessary. The company must also respect the rights and freedoms of the data subjects, and provide them with the means to exercise their rights, such as the right to access, rectify, erase, restrict, object or port. The most realistic step the company could take to address their security concerns and comply with the personal data processing principles set out in Article 5 of the GDPR is to restrict the camera placement to building entrances only. This would limit the scope and impact of the data processing, and reduce the risks to the personal data of the employees and visitors. The company would still need to inform the data subjects about the processing, and ensure that the footage is securely stored and transferred, especially if it is monitored by the home office in the United States, which is a third country that may not offer adequate protection for personal data. The company would also need to consider the possibility of obtaining the consent of the data subjects, or relying on another legal basis for the processing, such as the legitimate interests of the company or the performance of a contract.