How Did Palpatine Hide Being a Sith?

Description. Palpatine utilizing Force clouding while speaking with members of the Jedi Council Force clouding was a cloaking technique employed by the Sith to conceal their true nature from the Jedi and other users of the Force.

How did the Jedi not sense the dark side in Palpatine?

According to the novel Tarkin, below the Jedi Temple on Coruscant lies an ancient Sith shrine overflowing with corruptible energy of the dark side. Originally, the Jedi thought that by placing their temple on top of it, their light energy would neutralize the influence of the dark side, however, that wasn't the case.

Why did the Sith hide?

They used the term "dark side" because they were secretive. The Sith felt it was easier to impose order if they kept their identities and knowledge a secret or, as Lona Aphra put it, "hidden—in the dark."