How someone can get health insurance without sharing his health infor-mation? How you can get a loan without disclosing your credit score? There is a method to certify certain attributes of various data, either this is health metrics or finance information, without revealing the data itself or any other kind of personal data. This method is known as “zero-knowledge proofs”. Zero-Knowledge techniques are mathematical methods used to verify things without sharing or revealing underlying data. Zero-Knowledge protocols have vast applications from simple identity schemes and blockchains to de-fense research programs and nuclear arms control. In this article we present the basic principles behind ZKP technology, possible applications and the threats and vulnerabilities that it is subject to and we review proposed securi-ty solutions
