The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2000
Filed:
May. 20, 1998
Antoine Totaro, Muret, FR;
Erick Flores, Toulouse, FR;
Alcatel, Paris, FR;
Abstract
A method for enabling encrypted communication to be performed directly in a single hop or merely directly between two terminals of a mobile radio network by satellite and/or of the GSM/DCS type, after one of said terminals has called via a fixed radio station of the network. After a first encryption stage, performed in conventional manner, a cipher key is simultaneously generated by the identity card associated with the calling terminal and by the network control structure for encrypting/decrypting data transmitted over the radio link between said calling terminal and the station. This cipher key is then stored in a memory of the station so as to be transmitted to the called terminal when a radio link is set up between said station and said called terminal for the call requested by the calling terminal, and the key is used for the purpose of encrypting/decrypting the data interchanged between the calling and called terminals.