Welcome to the resource topic for 2016/1176
Title:
Leakage of Signal function with reused keys in RLWE key exchange
Authors: Jintai Ding, Saed Alsayigh, Saraswathy RV, Scott Fluhrer, Xiaodong Lin
Abstract:In this paper, we show that the signal function used in Ring-Learning with Errors (RLWE) key exchange could leak information to find the secret s of a reused public key p=as+2e. This work is motivated by an attack proposed in \cite{cryptoeprint:2016:085} and gives an insight into how public keys reused for long term in RLWE key exchange protocols can be exploited. This work specifically focuses on the attack on the KE protocol in \cite{Ding} by initiating multiple sessions with the honest party and analyze the output of the signal function. Experiments have confirmed the success of our attack in recovering the secret.
ePrint: https://eprint.iacr.org/2016/1176
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