Single sign-on has been a recurrent theme on the design of secure distributed systems.Currently, there are many well established solutions to some of these problems, ranging from the adoption of Kerberos on Windows based local networks to the use of the SAML and OAuth protocols in the Web context.However, the proliferation of mobile native applications that need to access protected resources introduced a new type of requirement: securely sharing identity and authorization between a set of applications running on the same device.This session addresses the emerging theme of single sign-on for mobile native applications, its challenges and some of the available solutions, namely the use of emerging protocols such as OpenID Connect.It also includes concrete examples exploring the functionalities already available in the Android platform.