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Title:
TEAKEX: TESLA-Authenticated Group Key Exchange
Authors: Qinyi Li, Lise Millerjord, Colin Boyd
Abstract:We present a highly efficient authenticated group key exchange protocol, TEAKEX, using only symmetric key primitives. Our protocol provides proven strong security, including forward secrecy, post-compromise security, and post-quantum security. For online applications we claim that TEAKEX is much simpler and more efficient than currently available alternatives. As part of our construction we also give a new abstract security definition for delayed authentication and describe its instantiation with the TESLA protocol.
ePrint: https://eprint.iacr.org/2025/1005
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