# Securing Construction Workers' Data Security and Privacy with Blockchain Technology
## 2 Literature Review  
### Traditional Methods of Data Management  
Traditional methods of data management for construction workers have long been utilized to safeguard their personal information even before the emergence of advanced technologies. These methods involve a combination of organizational policies, physical safeguards, and administrative practices aimed at safeguarding workers' privacy.  
One of the primary aspects of privacy management in the construction industry is the establishment of strict organizational policies and procedures. Employers typically develop privacy policies that outline the collection, use, and disclosure of workers' personal information [37]. These policies specify the purposes for which the information is collected and how it will be protected. By clearly communicating these policies to workers, employers ensure transparency and foster a culture of privacy protection [38]. Physical safeguards are another important component of privacy management. Construction companies implement measures to secure physical spaces where workers' personal information is stored. This can include locked filing cabinets, restricted access areas, and the use of secure storage systems. By limiting physical access to personal information, employers reduce the risk of unauthorized disclosure or theft [39].  
Administrative practices also play a crucial role in privacy management for construction workers. These practices involve processes and procedures for handling and managing personal information. Employers may designate specific individuals or departments responsible for collecting, storing, and handling personal data [40; 41]. The principle of \"need-to-know\" is commonly applied, where access to workers' personal information is granted only to individuals who require it for legitimate purposes related to employment or regulatory compliance. By limiting access to such information, construction companies minimize the risk of unauthorized disclosure or misuse [21].  
However, while traditional methods of privacy management for construction workers have been implemented over the years, they are not without their challenges. One significant challenge is the reliance on manual processes and paper-based documentation. This approach can be time consuming, prone to human error, and less secure compared to digital systems. Physical safeguards, such as locked filing cabinets, may provide some level of protection, but they can still be vulnerable to unauthorized access or theft [42].  
Additionally, [PERSON] and [PERSON] [21] affirm that the need-to-know principle, while essential for privacy management, can create difficulties in ensuring that only authorized individuals have access to personal information, especially in large construction projects with multiple stakeholders. The lack of standardized practices across the industry also poses challenges in terms of consistency and accountability in privacy management [43]. With the rise of digitization and data-centric processes in construction, ensuring the privacy and security of workers' personal information has become a crucial issue [22; 23; 24]. While traditional methods have provided some level of effectiveness, addressing these challenges requires a shift towards more advanced privacy management practices and the adoption of secure and efficient digital solutions.