Method of providing an authenticable time-and-location indication

摘要

A method of providing an authenticable time-and-location indication using a radio-navigation signal receiver comprises receiving radio-navigation signals broadcast from a plurality of radio-navigation signal sources, at least some of the radio-navigation signals containing one or more cryptographic tokens protected by encryption, the cryptographic tokens being updated from time to time. The receiver retrieves, by decryption, the cryptographic tokens from the radio-navigation signals containing them. The receiver then determines positioning data, representing its geographical position and time, based on the radio-navigation signals received. The receiver generates a digital authentication code using a cryptographic function taking as inputs at least the positioning data and the retrieved cryptographic tokens, and produces a data package including a first part containing the positioning data and a second part containing the digital authentication code.

主权项

1. A method of providing an authenticable time-and-location indication using a radio-navigation signal receiver, said method comprising the following steps:
a) receiving radio-navigation signals broadcast from a plurality of radio-navigation signal sources, at least some of said radio-navigation signals containing one or more cryptographic tokens per signal source protected by encryption, said cryptographic tokens being updated from time to time; b) retrieving said cryptographic tokens from said radio-navigation signals containing them, by decryption; c) determining positioning data based on said radio-navigation signals received, said positioning data, including geographical position and time of said radio-navigation signal receiver; d) generating a digital authentication code using a cryptographic function taking as inputs at least said positioning data and said retrieved cryptographic tokens; e) producing a data package including a first and a second part, said first part containing said positioning data and a receiver public identifier and said second part containing said digital authentication code; and f) providing further data to protect user identification data, signal-in-space integrity data, a receiver software fingerprint, further positioning data, digital signature identifying the user and/or one or more digital documents, wherein said digital authentication code is generated using said cryptographic function taking as an input also said further data to protect.