Emmanuel started working in the mobile telecommunications industry in the early 90′s while following an advanced late-night curriculum in in-band signalling. Distressed by the apparent death of phreaking due to the introduction of the SS7 out-of-band signalling, he embarked on a decade-long quest to return this early form of telephone hacking to its former glory. In 2001 he presented the first-ever public speech about GSM security at the Black Hat briefings in Hong Kong and Singapore, followed by a streams of other presentations on that topic at major security events across Europe and Asia. In 2002 co-founded TSTF with Philippe Langlois to conduct security research on telecommunications systems and assisting mobile operators in securing their infrastructure, a Sisyphean effort in the complex and ever-changing world of mobile telecom carriers. Emmanuel has been based in Asia for almost 20 years and owns a Siamese kitten called Socket.