Cryptography in Blockchain

Abstract

There is a vast multitude of different hashing and cryptography algorithms out there, and more are developed every year. Blockchain technology, and crypto-currencies specifically, raised many concerns in different institutions. Users want to be sure that their assets are adequately protected by the best available algorithms, but some institutions around the world are opposed to that, or enforce their own standards. Ideally, every platform would allow its users to choose any algorithm they want, but in most situations this is, unfortunately, not the case. In this paper we present a review of the most popular blockchain platforms and the options they provide, and compare their cryptographic strength.