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Title:
Adaptive Multiparty NIKE
Authors: Venkata Koppula, Brent Waters, Mark Zhandry
Abstract:We construct adaptively secure multiparty non-interactive key exchange (NIKE) from polynomially hard indistinguishability obfuscation and other standard assumptions. This improves on all prior such protocols, which required sub-exponential hardness. Along the way, we establish several compilers which simplify the task of constructing new multiparty NIKE protocols, and also establish a close connection with a particular type of constrained PRF.
ePrint: https://eprint.iacr.org/2022/1324
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