On the Security of an Unconditionally Secure, Universally Composable Inner Product Protocol
This addresses security flaws in a cryptographic protocol, which is incremental as it critiques an existing method.
The paper identifies security vulnerabilities in a distributed inner product protocol, showing information leakage that can allow one party to fully learn the other's input in certain scenarios.
In this paper we discuss the security of a distributed inner product (DIP) protocol [IEEE TIFS, 11(1), (2016), 59-73]. We show information leakage in this protocol that does not happen in an ideal execution of DIP functionality. In some scenarios, this information leakage enables one of the parties to completely learn the other party's input. We will give examples of such scenarios.