Signal Founder Says Cellebrite's Forensics Tools Flawed Twitter Get Permission Signal creator Moxie Marlinspike speaking at "The Cryptographer's Panel" at RSA Conference 2018 (Photo: Mathew J. Schwartz/ISMG) Law enforcement agencies use digital forensics tools from the Israeli company Cellebrite to gain access to locked mobile devices and extract data as part of evidence-gathering during the course of an investigation. But in a shot across the bow to the vendor's business model, Moxie Marlinspike (@moxie), creator of the encrypted messaging app Signal, says flaws in Cellebrite's devices call into question whether the data the tools extract can be considered reliable - for example, in court.