The Empire's Might
Imperial Security Bureau (ISB)
The Imperial Security Bureau (ISB), the public branch known as Imperial Security Services or simply Imperial Security, is a law enforcement and internal intelligence organisation of the Galactic Empire under Galactic Emperor Palpatine. Formed in 19 BBY and based in the massive ISB Central Office on Imperial Center, it is separate from, larger than, and often rival to Imperial Intelligence.
It is known that the ISB station moles among the officers of all capital ships in the Imperial Navy; their duty is to report on any possibly treasonous activities or sentiments present among others of the ship’s crew (especially the commander), and to execute them if they acted upon them. The ISB serve more of a police function than Imperial Intelligence, with a more public presence; ISB operatives are not afraid of identifying themselves. The ISB are also responsible for wiping out any memories of the traitorous Jedi Order.