This document discusses online voting systems and e-voting. It describes different types of voting systems including paper-based, DRE, and internet voting. It outlines the objectives of e-voting including authenticating voters, maintaining ballot integrity, and ensuring system availability. Both advantages like convenience and faster results, and disadvantages like security issues are discussed. The document then describes how e-voting has been implemented in elections in several countries. It provides details about Gujarat's implementation of e-voting including costs, registration process, voting steps, and security algorithms used.