Article’s

With the rapid growth of digital transformation, the storage and sharing of sensitive documents have become a major security concern. Traditional document-sharing methods are vulnerable to unauthorized access, data leakage, and misuse. To overcome these challenges, secure document locker systems integrated with QR code technology have gained significant attention. QR codes provide fast and contactless access, while encryption techniques ensure data confidentiality and integrity. This survey paper reviews various research works related to secure QR code–based document locker systems. It analyzes different security mechanisms, authentication techniques, encryption methods, and access control models used in existing systems. A comparative study is presented to highlight the advantages and limitations of each approach. Finally, the paper identifies research gaps and discusses future directions for improving the security and efficiency of QR code–based document storage systems.