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:
Aug. 13, 2013
Filed:
Nov. 13, 2008
Vincent Dupuis, Issy les Moulineaux, FR;
Marc Chaland, Levis St Nom, FR;
Patrick Radja, Bonnelles, FR;
Stephane Allouche, Senantes, FR;
Ahmed Serhrouchni, Paris, FL (US);
Mustapha Adib, Paris, FR;
Vincent Dupuis, Issy les Moulineaux, FR;
Marc Chaland, Levis St Nom, FR;
Patrick Radja, Bonnelles, FR;
Stephane Allouche, Senantes, FR;
Ahmed Serhrouchni, Paris, FL (US);
Mustapha Adib, Paris, FR;
Cassidian SAS, Elancourt, FR;
Abstract
A method is presented for distributing cryptographic keys in a hierarchized network including at least one device in charge of a higher group of devices, wherein at least one of the devices of the higher group of devices is also in charge of a lower group of devices. The method includes the steps of: a) storing a set of identifiers particular to the higher group, an identifier particular to the device in charge, an identifier per device in charge of a lower group, each identifier being unique; storing a root cryptographic key; c) providing a root cryptographic key to each device in charge of a lower group using a first non-reversible cryptographic function; d) providing at least one transport cryptographic key to each member of said higher group of devices using a second non-reversible cryptographic function.