What does SSi stand for in the context of Homeland Security?

In the context of Homeland Security, SSi stands for Sensitive Security Information. This term is used to classify information that is not classified under the standard government classification categories but still requires protection due to its potential to compromise security efforts, transportation security, or public safety if disclosed.

Sensitive Security Information encompasses various types of data, such as security procedures, security assessments, and other information that could impact national security if released. The aim of designating this information as sensitive is to limit its access to authorized personnel only, thus ensuring that security measures remain effective. By doing so, Homeland Security aims to protect both the infrastructure and the public from potential threats or vulnerabilities.

This classification is critical in maintaining the safety and operational integrity of various sectors, including transportation, and emphasizes the importance of managing and safeguarding sensitive, yet unclassified, security information.