Explore the critical importance of securing Java Virtual Machines (JVMs) in this 44-minute conference talk from GOTO Chicago 2019. Delve into potential security risks associated with unsecured JVMs, including data breaches and malicious code execution. Learn how to identify and mitigate vulnerabilities through practical examples and demonstrations. Discover essential techniques for hardening JVM security, such as implementing proper permissions, configuring policy files, and utilizing security managers. Gain insights into the complexities of securing non-trivial applications and the potential consequences of neglecting JVM security. Follow along as the speaker showcases real-world scenarios, provides code examples, and offers valuable references for further study in Java application security.