The encryption module was a device capable of encoding communications in entire regions of space. It was a palm-sized device, able to be transported easily.
After a short skirmish in zero gravity, Meebur Gascon and his team was successfully obtained the module. With Aut-O defeated, D-Squad made their way back to their ship and escaped from the capital ship with module.
After encountering comets that caused their shuttle to crash, D-Squad almost lost the module. Fortunately R2-D2 found the device. The module remained in the droid's possession during D-Squad's stay on the planet Abafar. R2 used the module to persuade the Zilkin Colonel in following him into the Void.
Eventually, D-Squad got out of the Void and reached the town of Pons Ora. There Gascon managed to recruit a clone with amnesia called Gregor to help his team in getting to a Nu-class attack shuttle. Gregor sacrificed himself so the droids can get to the Republic cruiser orbiting the planet and take the module to the Republic.
The team thought they had reached a safe place and were ready to give the acquired module to a group of clone officers on the bridge. As Gascon was handing the module to one of the officers the module, it fell through his hand. All the crew were holograms. The cruiser turned out to be hijacked by the Separatists and had been turned into a giant bomb full of Rhydonium.
The team managed to survived many obstacles on the ship in their efforts to keep the module safe and not fall in Separatist hands.
When D-Squad met with surviving Republic droids, a plan was devised to stop the cruiser.
R2-D2 had to blow up the ship after it came out of hyperspace and the rest of D-Squad had to make it to the shuttle. The module was on Gascon's back at the time.
Everything went according to plan. After reaching its destination, everybody except R2 made it to the shuttle and flew off, but R2-D2 stayed behind and triggered the detonator. The cruiser with all the Rhydonium was destroyed and R2 managed to survive. Thanks to the efforts of D-Squad, the encryption module ended its long voyage in Republic authority.