The main focus of this report is to study the security challenges surrounding user authentication on mobile devices and look at the technologies available in the market that offer robust user authentication mechanisms to protect enterprises against unauthorized access to their data, applications, and connectivity. The first chapter analyzes the trends driving the adoption of stronger authentication solutions. The second chapter talks about the variety of authentication technologies available in the market, emphasizing on OTP, software tokens, single sign-on, public key infrastructure (PKI), and other software based authentication mechanisms. The final chapter provides an analysis of different players in the market and includes a review of six companies: MobileIron, Gemalto, Centrify, Entrust Datacard, SecureAuth, and Sansa Security.