Security pass

A Security Pass was a means by which entrance was granted to areas with limited access.

The secret spaceport built by the Duras faction on Halee II had a control tower which required a security pass to access.

The pass gave off slight energy emissions which allowed it to be detected by the USS Enterprise-D’s sensors in a natural cavern where Lieutenant Commander Worf found it on the body of a Klingon who had been killed off by the local wildlife.

Worf commented that it could be useful if it was not outdated. (TNG video game: Generations)