To combat the increasing number of cyberattacks targeted at critical infrastructure, the Department of Homeland Security's Transportation Security Administration (TSA) issued several security directives in 2021-23.

1. TSA Security Directive Pipeline-2021-02D aims to increase the security posture of the owners and operators of US-based gas and liquid pipelines.

2. TSA Security Directive 1580-21-01A focuses on improving cybersecurity for passenger and freight railroad carriers.

Read this white paper for a detailed walkthrough of the TSA requirements, with callouts for industry-specific differences.