A Review on Zero Knowledge Proof Vulnerabilities in Zcash

Abstract

The Zcash cryptocurrency is the first well-known application of zk-SNARKs in the blockchain. The role of Zk-SNARK is to provide privacy and confidentiality. As blockchain is incapable of providing privacy in the blockchain system, the researchers are banking at Zero Knowledge Proof protocols as the solution to the privacy problem. The Zero Knowledge Proof is a relatively new technique. Hence, currently, it comes with many risks and vulnerabilities. This paper mentions risks in cryptocurrency with Zero Knowledge Proof, primarily of Zcash. The discussed vulnerabilities are information leakage in transactions, trust risk, implementation vulnerability, and other security issues.