[Resource Topic] 2021/1494: On the efficiency of a general attack against the MOBS cryptosystem

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Title:
On the efficiency of a general attack against the MOBS cryptosystem

Authors: Christopher Battarbee, Delaram Kahrobaei, Dylan Tailor, Siamak F. Shahandashti

Abstract:

All instances of the semidirect key exchange protocol, a generalisation of the famous Diffie-Hellman key exchange protocol, satisfy the so-called ``telescoping equality’‘; in some cases, this equality has been used to construct an attack. In this report we present computational evidence suggesting that an instance of the scheme called `MOBS (Matrices Over Bitstrings)’ is an example of a scheme where the telescoping equality has too many solutions to be a practically viable means to conduct an attack.

ePrint: https://eprint.iacr.org/2021/1494

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