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:
Sep. 12, 2017
Filed:
Sep. 13, 2012
Kari J. Leppänen, Helsinki, FI;
Philip Ginzboorg, Espoo, FI;
Janne Kulmala, Tampere, FI;
Antti Laine, Tampere, FI;
Marko Hannikainen, Pirkkala, FI;
Kari J. Leppänen, Helsinki, FI;
Philip Ginzboorg, Espoo, FI;
Janne Kulmala, Tampere, FI;
Antti Laine, Tampere, FI;
Marko Hannikainen, Pirkkala, FI;
Nokie Technologies Oy, Espoo, FI;
Abstract
A method for establishing an encrypted communication channel is described. Query IDs are generated at a first device. Each query ID identifies a keyword in a set of keywords. Query IDs are received, at a second device. A second set of keywords is determined by the second device based on the query IDs. Match IDs are determined based on the second set. Each match ID identifies a keyword in the second set. An encryption key is generated based on the second set. A response is sent which includes the match IDs and an encrypted message. At the first device, the second set is determined based on the match IDs. The second set includes keywords of the first set of keywords identified by the match IDs. The encryption key is generated at the first device and the encrypted message is decrypted. Apparatus and computer readable media are also described.