Secure transmission of official time, e.g. for digital signatures on electronic documents by encrypting and transmitting via mobile network

摘要

The method involves supplying time information to a network (GSM, UMTS) of a mobile network operator. The time information is encrypted and transmitted to at least one terminal (mobile and/or fixed terminal) where it is deciphered. The time information may be based on the standard time transmitted e.g. from Brunswick.