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. 20, 2012
Filed:
Jul. 20, 2010
Jahanshah Moreh, Beverly Hills, CA (US);
Logan O'sullivan Bruns, Napa, CA (US);
Jahanshah Moreh, Beverly Hills, CA (US);
Logan O'Sullivan Bruns, Napa, CA (US);
Proofpoint, Inc, Sunnyvale, CA (US);
Abstract
A secure communication system wherein message decryption may be performed while off-line, or optionally while on-line. A sender encrypts a message based on the message key and sends it to the recipient. An envelope containing a message key is created by encrypting the message key based on a verifier, where the verifier is based on a secret of the recipient. The recipient is provided the envelope, along with the message or separately, from the sender or from another party, contemporaneous with receipt of the message or otherwise. The recipient can then open the envelope while off-line, based on their secret, and retrieve the message key from the envelope to decrypt the message. In the event the recipient cannot open the envelope, optional on-line access permits obtaining assistance that may include obtaining an alternate envelope that the recipient can open.