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:
Jul. 23, 2013
Filed:
Aug. 06, 2007
Mark Herbert Priebatsch, Park Orchards, AU;
Mark Herbert Priebatsch, Park Orchards, AU;
Activcard, Suresnes Cedex, FR;
Abstract
This invention provides a simple and secure PIN unblock mechanism for use with a security token. A set of one or more passphrases are stored on a remote server during personalization. Likewise, the answers to the passphrases are hashed and stored inside the security token for future comparison. A local client program provides the user input and display dialogs and ensures a secure communications channel is provided before passphrases are retrieved from the remote server. Retrieval of passphrases and an administrative unblock secret from the remote server are accomplished using a unique identifier associated with the security token, typically the token's serial number. A PIN unblock applet provides the administrative mechanism to unblock the security token upon receipt of an administrative unblock shared secret. The remote server releases the administrative unblock shared secret only after a non-forgeable confirmatory message is received from the security token that the user has been properly authenticated. The administrative unblock shared secret is encrypted with the token's public key during transport to maximize security.