Welcome to the resource topic for 2018/928
Title:
Generic Authenticated Key Exchange in the Quantum Random Oracle Model
Authors: Kathrin Hövelmanns, Eike Kiltz, Sven Schäge, Dominique Unruh
Abstract:We propose FO-AKE a generic construction of two-message authenticated key exchange (AKE) from any passively secure public key encryption (PKE) in the quantum random oracle model (QROM). Whereas previous AKE constructions relied on a Diffie-Hellman key exchange or required the underlying PKE scheme to be perfectly correct, our transformation allows arbitrary PKE schemes with non-perfect correctness. Furthermore, we avoid the use of (quantum-secure) digital signature schemes which are considerably less efficient than their PKE counterparts. As a consequence, we can instantiate our AKE transformation with any of the submissions to the recent NIST post-quantum competition, e.g., ones based on codes and lattices. FO-AKE can be seen as a generalization of the well known Fujisaki-Okamoto transformation (for building actively secure PKE from passively secure PKE) to the AKE setting. Therefore, as a helper result, we also provide a security proof for the Fujisaki-Okamoto transformation in the QROM for PKE with non-perfect correctness. Our reduction fixes several gaps in a previous proof (CRYPTO 2018), is tighter, and tolerates a larger correctness error.
ePrint: https://eprint.iacr.org/2018/928
Talk: https://www.youtube.com/watch?v=126Vn9DNcOg
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 .