In December 2015, the Finnish Communications Regulatory Authority granted official encryption product approval to the Bittium Tough Mobile and its management and encryption system for processing national classification level IV (ST IV) material. The encryption product approval now also covers the Digia Salpa mobile communications solution, which is used in the smartphone to encrypt calls and messages. The Finnish Communications Regulatory Authority's assessment was based on the official Katakri 2015 auditing tool and the Authority's guidelines for cryptographic strength requirements. "This approved highly secure encryption solution provides companies and public administration with excellent opportunities to ensure the privacy of communications and the confidentiality of data in electronic services and online environments," said Jarkko Saarimäki, Director of the National Cyber Security Centre.