The Feraleechi Onetime Loop was an encryption which involved a multiple-step process to get to the final message. Called a "onetime loop" because the code was set to trigger on certain days on the HoloNet.
A keyword in the morning news provided a way to partially decipher the code, revealing a number series that referred to a group of tedious-to-read texts, which kept them out of the mainstream. Once the text was located they were translated from Basic into Symbian. Then, every sixth word was transposed to reveal the original message. This system of securing messages was adopted by the Confederacy of Independent Systems during the Clone Wars, to ensure that even the most basic communication was not deciphered by the Galactic Republic.