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. 04, 2009
Filed:
Mar. 14, 2003
Guido Appenzeller, Menlo Park, CA (US);
Matthew J Pauker, Menlo Park, CA (US);
Terence Spies, Palo Alto, CA (US);
Rishi R Kacker, Menlo Park, CA (US);
Guido Appenzeller, Menlo Park, CA (US);
Matthew J Pauker, Menlo Park, CA (US);
Terence Spies, Palo Alto, CA (US);
Rishi R Kacker, Menlo Park, CA (US);
Voltage Security, Inc., Palo Alto, CA (US);
Abstract
A system is provided that uses identity-based encryption to support secure communications between senders and recipients over a communications network. Private key generators are used to provide public parameter information. Senders encrypt messages for recipients using public keys based on recipient identities and using the public parameter information as inputs to an identity-based encryption algorithm. Recipients use private keys to decrypt the messages. There may be multiple private key generators in the system and a given recipient may have multiple private keys. Senders can include private key identifying information in the messages they send to recipients. The private key identifying information may be used by the recipients to determine which of their private keys to use in decrypting a message. Recipients may obtain the correct private key to use to decrypt a message from a local database of private keys or from an appropriate private key server.