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:
Nov. 22, 2005
Filed:
Feb. 10, 2000
Denis Pinkas, Chaville, FR;
Denis Pinkas, Chaville, FR;
Bull, S.A., Louveciennes, FR;
Abstract
For a set (Lk) of embedded systems, an authorized operator with identifier (OP) creates a mother public key (KpM) and a mother private key (KsM). The identifier (OP), the range of identifiers referenced (Lk) and the mother public key (KpM) are published. For each embedded system (SN), a diversified key (KsM) is created from the identifier (SN) and stored. For every public key (Kp) generated by an embedded system, a cryptographic control value (Sc) is calculated on the public key (Kp), an algorithm identifier (CA) and the utilization parameters (U) of this key, using a zero knowledge signature algorithm, and a certification request message (MRCA) that includes control value (Sc), the identifier of the operator (Op), and identifier (SN) is transmitted to a certification authority, which retrieves the identifier (Op) and the value of the mother public key (KpM).