Both devices and users will be authenticated in a very secure way. NFC (Near Field Communication) hardware and the Kelisec software can secure buildings as embassies.
Documents, applications, forms and other agreements can be signed in a very secure way. The authority can also log all sessions to be able to verify which unit that was active for each signing.
All communication is encrypted with strongest available method. The communication sequence mutates every millisecond. This makes it secure against all known attacks and man-in-the-middle attacks.