Loading...

Design and Analysis of Efficient Oblivious Transfer Protocols

Khosravani, Keykhosro | 2025

0 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 58134 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Aref, Mohammad Reza; Eghlidos, Taraneh
  7. Abstract:
  8. Oblivious Transfer (OT) is a fundamental cryptographic primitive used in many privacy-preserving applications, such as secure multiparty computation, private function evaluation, secure data sharing, electronic voting, and location-based services. Designing efficient OT protocols with strong security is especially important for resource-limited systems like IoT devices, which have constraints on computing power, memory, and bandwidth. This thesis introduces three efficient pairing-free k-out-of-N oblivious transfer protocols that meet standard security requirements. The proposed protocols minimize communication overhead: the receiver sends k messages to the sender, who replies with n+k messages, achieving one of the lowest communication costs among similar pairing-free protocols. These protocols also support adaptivity and allow the sender to encrypt n messages offline, without depending on the receiver’s choices. This makes them especially useful for scenarios with one sender and multiple receivers. The security of these protocols is based on well-known assumptions, such as the Computational Diffie-Hellman (CDH) problem and the RSA hardness assumption, and does not rely on the Random Oracle Model. By avoiding heavy computations like pairings, the protocols are lightweight and efficient, making them ideal for IoT devices and other resource-constrained systems. These protocols combine low communication cost, adaptability, offline encryption, and strong security, making them suitable for privacy-focused applications in environments with limited resources
  9. Keywords:
  10. Secure Multiparty Computation (SMC) ; Oblivious Transfer Protocol ; Efficient Protocols for Resource-Limited Systems ; Standard Security ; Data Privacy ; Privacy Preserving

 Digital Object List

 Bookmark

No TOC