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:
Jun. 27, 2006
Filed:
Dec. 19, 2000
Ravi Sandhu, Fairfax, VA (US);
Colin Desa, Herndon, VA (US);
Karuna Ganesan, Norcross, GA (US);
TriCipher, Inc., San Mateo, CA (US);
Abstract
A system for authentication of a crypto-system user by the use of both symmetric and asymmetric crypto-keys is provided. A first network station, representing the user, transmits a first request for authentication to a second network station. The second station generates a shared symmetric crypto-key, encrypts it and forwards it to both the first station and a third network station. The third station encrypts the received shared symmetric crypto-key and forwards it to the first network station. The first network station combines the two instances of the received and encrypted shared symmetric crypto-key, decrypts the combined symmetric crypto-key to recover shared symmetric crypto-key, encrypts a second authentication request with the recovered shared symmetric crypto-key, and transmits the encrypted authentication request to authenticate the first station. Each transmission of the shared symmetric crypto-key is encrypted with different portion of different ones of multiple asymmetric crypto-keys, each associated with a network station.