The recent terrorist attacks in Paris are fueling the debate over whether law enforcement or intelligence officials should be given access to encrypted communications.

Sources told Legaltech News that at this point it appears to be “100 percent” certain the terrorists and their leaders used such technology as encryption to communicate before the attacks—though the investigation continues. There is speculation they also used PlayStation or mobile apps to communicate among themselves before the deadly attacks took place. After all, they had to plan and coordinate the attacks while they were in Syria, France and Belgium.