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Title:
Note: Shared Key Recovery Attack on Cascader Key Exchange Protocol
Authors: Nick Aquina, Simon Rommel, Idelfonso Tafur Monroy
Abstract:Cascader has been introduced as a new key exchange protocol based on iterative multiplicative recurrence. This short note presents a practical shared key recovery attack on the Cascader key exchange protocol. This note also shows that Cascader as a hash function is not collision resistant, presents a new upper bound on the output space of Cascader and shows that a Cascader-based KDF is not secure against an Adaptive Chosen Public Inputs Attack (CPM).
ePrint: https://eprint.iacr.org/2025/1418
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