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- W2962284902 abstract "Group key-exchange protocols allow a set of N parties to agree on a shared, secret key by communicating over a public network. A number of solutions to this problem have been proposed over the years, mostly based on variants of Diffie-Hellman (two-party) key exchange. To the best of our knowledge, however, there has been almost no work looking at candidate post-quantum group key-exchange protocols. Here, we propose a constant-round protocol for unauthenticated group key exchange (i.e., with security against a passive eavesdropper) based on the hardness of the Ring-LWE problem. By applying the Katz-Yung compiler using any post-quantum signature scheme, we obtain a (scalable) protocol for authenticated group key exchange with post-quantum security. Our protocol is constructed by generalizing the Burmester-Desmedt protocol to the Ring-LWE setting, which requires addressing several technical challenges." @default.
- W2962284902 created "2019-07-23" @default.
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- W2962284902 date "2019-01-01" @default.
- W2962284902 modified "2023-10-16" @default.
- W2962284902 title "Constant-Round Group Key Exchange from the Ring-LWE Assumption" @default.
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- W2962284902 doi "https://doi.org/10.1007/978-3-030-25510-7_11" @default.
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