Cryptanalysis of Grigoriev-Shpilrain Physical Asymmetric Scheme With Capacitors

Few days ago Grigoriev and Shpilrain have proposed to build a system for transmission of information without a shared secret, or essentially a sort of public key cryptosystem, based on properties of physical systems. In this paper we show that their second scheme based on capacitors is insecure and extremely easy to break in practice

Physical Cryptography

We recall a series of physical cryptography solutions and provide the reader with relevant security analyses. We mostly turn our attention to describing attack scenarios against schemes solving Yao\u27s millionaires\u27 problem, protocols for comparing information without revealing it and public key cryptosystems based on physical properties of systems