Welcome to the resource topic for 2022/415
Title:
Efficient and Tight Oblivious Transfer from PKE with Tight Multi-User Security
Authors: Saikrishna Badrinarayanan, Daniel Masny, Pratyay Mukherjee
Abstract:We propose an efficient oblivious transfer in the random oracle model based on public key encryption with pseudorandom public keys. The construction is as efficient as the state of art though it has a significant advantage. It has a tight security reduction to the multi-user security of the underlying public key encryption. In previous constructions, the security reduction has a multiplicative loss that amounts in at least the amount of adversarial random oracle queries. When considering this loss for a secure parameter choice, the underlying public key encryption or elliptic curve would require a significantly higher security level which would decrease the overall efficiency. Our OT construction can be instantiated from a wide range of assumptions such as DDH, LWE, or codes based assumptions as well as many public key encryption schemes such as the NIST PQC finalists. Since tight multi-user security is a very natural requirement which many public key encryption schemes suffice, many public key encryption schemes can be straightforwardly plugged in our construction without the need of reevaluating or adapting any parameter choices.
ePrint: https://eprint.iacr.org/2022/415
See all topics related to this paper.
Feel free to post resources that are related to this paper below.
Example resources include: implementations, explanation materials, talks, slides, links to previous discussions on other websites.
For more information, see the rules for Resource Topics .