O2 (UK) first commercial General Packet Radio Service. BT Cellnet, together with BT Group's mobile telecommunications businesses in Germany, Ireland and the Netherlands, was part of the BT Wireless division. This was spun off from the BT Group in 2002 to form a new holding company, mmO2 plc, which introduced the new "O2" brand for the businesses. In 2005, mmO2 plc was renamed O2 plc. O2 plc was purchased by the Spanish telecommunications company Telefónica in 2006 for £18 billion. Under the terms of the acquisition, Telefónica agreed to retain the "O2" brand and the company's UK headquarters. O2 plc became Telefónica
Safelayer Secure Communications Safelayer Secure Communications Safelayer Secure Communications S.A. is a Spanish private company founded in May 1999. It develops software products on the Public key infrastructure area (digital security for the identity management, electronic signature and data protection). Safelayer's technology is part of the three major certification and digital identity projects in Spain: Fábrica Nacional de Moneda y Timbre, the Spanish ID card "DNI electrónico" and the Spanish E-passport. Safelayer's technology also secures the NATO X400 messaging system". Safelayer's technology has been and Common Criteria certified. Currently, Safelayer is the only company with a whole family of products CC EAL4+ certified.