Explore how to leverage Rubocop for detecting and preventing security vulnerabilities in Ruby code in this 27-minute conference talk from RubyConf 2021. Discover the process of using Abstract Syntax Trees and Node Patterns to identify security antipatterns, with a focus on Rails applications. Learn to create custom Rubocop cops for automated security checks, prioritize developer experience, and effectively manage offenses. Gain insights into Betterment's approach to integrating security practices into their development workflow, and understand how to implement similar strategies to enhance code quality and security in your own Ruby projects.