In this talk I will present the Tamarin Prover, an analysis tool for symbolic security analysis of systems. A prime example of systems that fall within its scope are security protocols that are executed in the presence of an active attacker. Tamarins state-of-the-art analysis of such systems requires dealing with unbounded replication of processes, loops, the prolific behaviour of the attacker, and equational theories to model cryptographic operations as accurately as possible within the symbolic model. This tutorial covers Tamarins system specification, execution model, and property specification language. I will demonstrate how Tamarin can automatically analyse systems, and how its extensive interactive mode aids in the analysis of more complex systems. Finally, I will touch upon Tamarins more advanced features and larger succesful case studies, such as the upcoming TLS 1.3 internet standard.