Blar i Institutt for matematiske fag på forfatter "Wagner, Benedikt"
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Chopsticks: Fork-Free Two-Round Multi-signatures from Non-interactive Assumptions
Pan, Jiaxin; Wagner, Benedikt (Peer reviewed; Journal article, 2023)Multi-signatures have been drawing lots of attention in recent years, due to their applications in cryptocurrencies. Most early constructions require three-round signing, and recent constructions have managed to reduce the ... -
Generic constructions of master-key KDM secure attribute-based encryption
Pan, Jiaxin; Qian, Chen; Wagner, Benedikt (Peer reviewed; Journal article, 2023)Master-key key-dependent message (mKDM) security is a strong security notion for attribute-based encryption (ABE) schemes, which has been investigated in recent years. This line of research was started with identity-based ... -
Lattice-Based Authenticated Key Exchange with Tight Security
Pan, Jiaxin; Wagner, Benedikt; Zeng, Runzhi (Peer reviewed; Journal article, 2023)We construct the first tightly secure authenticated key exchange (AKE) protocol from lattices. Known tight constructions are all based on Diffie-Hellman-like assumptions. Thus, our protocol is the first construction with ... -
Lattice-Based Signatures with Tight Adaptive Corruptions and More
Pan, Jiaxin; Wagner, Benedikt (Peer reviewed; Journal article, 2022)We construct the first tightly secure signature schemes in the multi-user setting with adaptive corruptions from lattices. In stark contrast to the previous tight constructions whose security is solely based on number-theoretic ... -
Short Identity-Based Signatures with Tight Security from Lattices
Pan, Jiaxin; Wagner, Benedikt (Peer reviewed; Journal article, 2021)We construct a short and adaptively secure identity-based signature scheme tightly based on the well-known Short Integer Solution (SIS) assumption. Although identity-based signature schemes can be tightly constructed from ... -
Tighter Security for Generic Authenticated Key Exchange in the QROM
Pan, Jiaxin; Wagner, Benedikt; Zeng, Runzhi (Peer reviewed; Journal article, 2023)Home Advances in Cryptology – ASIACRYPT 2023 Conference paper Tighter Security for Generic Authenticated Key Exchange in the QROM Download book PDF Download book EPUB Tighter Security for Generic Authenticated Key ...