Privacy-Preserving Data Exchange: Cryptographic Primitives and Solutions

This thesis explores secure and private ways to share and manage sensitive information online. It introduces new systems for file sharing and drone operations, ensuring personal data stays confidential and protected. Using advanced cryptographic techniques, the research hides important metadata and controls who can access files. This work makes digital communication safer and more private, which is crucial for secure information exchange. The findings have practical value, enhancing privacy and security in our increasingly digital world.