Source: http://www.google.com/patents/US8205084?dq=7,479,949
Timestamp: 2015-07-28 04:55:18
Document Index: 484651201

Matched Legal Cases: ['application No. 2005204223', 'Application No. 200307398', 'Application No. 200307400', 'Application No. 02815759', 'Application No. 2003', 'Application No. 200510095984', 'Application No. 02817741', 'Application No. 02734959', 'Application No. 09166522', 'Application No. 02744963', 'Application No. 02734959', 'Application No. 02734959', 'Application No. 02744963', 'application No. 04104240', 'Application No. 09166522', 'Application No. 05826460', 'Application No. 05826460', 'Application No. 05826460', 'Application No. 09166522', 'Application No. 2174', 'Application No. 2176', 'Application No. 02815485', 'Application No. 02815759', 'Application No. 2290', 'Application No. 2003', 'Application No. 2174', 'Application No. 2176', 'Application No. 2006', 'Application No. 10', 'Application No. 10', 'Application No. 159342', 'Application No. 2003', 'Application No. 2003', 'Application No. 02815485', 'Application No. 2', 'Application No. 2003', 'Application No. 2005', 'Application No. 2005', 'Application No. 2003', 'Application No. 02815759', 'Application No. 159340', 'Application No. 159342', 'Application No. 2003', 'Application No. 2003', 'Application No. 2003', 'Application No. 2003', 'Application No. 2003', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 159340', 'Application No. 159340', 'Application No. 159340', 'Application No. 2003', 'Application No. 2003', 'art 3', 'art 3', 'Application No. 02734959', 'Application No. 02815759', 'Application No. 200505340', 'Application No. 02734959', 'Application No. 02744963', 'Application No. 02815759', 'application No. 200505624']

Patent US8205084 - System and method for processing encoded messages for exchange with a mobile ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA system and method are provided for pre-processing encrypted and/or signed messages at a host system before the message is transmitted to a wireless mobile communication device. The message is received at the host system from a message sender. There is a determination as to whether any of the message...http://www.google.com/patents/US8205084?utm_source=gb-gplus-sharePatent US8205084 - System and method for processing encoded messages for exchange with a mobile data communication deviceAdvanced Patent SearchPublication numberUS8205084 B2Publication typeGrantApplication numberUS 12/686,046Publication dateJun 19, 2012Priority dateJun 12, 2001Also published asCA2450631A1, CA2450631C, CN1653459A, CN1653459B, CN1717697A, CN1717697B, EP1410296A2, US7653815, US7827406, US8447980, US8527767, US20040196978, US20050163320, US20100115264, US20100124333, US20110231646, US20130318344, WO2002102009A2, WO2002102009A3Publication number12686046, 686046, US 8205084 B2, US 8205084B2, US-B2-8205084, US8205084 B2, US8205084B2InventorsJames A. Godfrey, Herbert A. LittleOriginal AssigneeResearch In Motion LimitedExport CitationBiBTeX, EndNote, RefManPatent Citations (143), Non-Patent Citations (176), Referenced by (7), Classifications (52), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetSystem and method for processing encoded messages for exchange with a mobile data communication device
US 8205084 B2Abstract
This application claims priority to U.S. provisional application Ser. No. 60/297,681 (entitled “An Advanced System and Method for Compressing Secure E-Mail for Exchange with a Mobile Data Communication Device” filed Jun. 12, 2001). By this reference the full disclosure, including the drawings, of U.S. provisional application Ser. No. 60/297,681 is incorporated herein. This application is a divisional of U.S. patent application Ser. No. 10/480,514 entitled “System and Method for Processing Encoded Messages for Exchange with a Mobile Data Communication Device” filed Dec. 11, 2003, which is a national stage entry of PCT/CA02/00890, filed Jun. 12, 2002. The entirety of all of which is herein incorporated by reference.
Also shown in FIG. 1 is a composed e-mail message 15 leaving the e-mail sender 10, located somewhere on the Internet 20. This message 15 is fully in the clear and uses traditional SMTP, RFC822 headers and MIME body parts to define the format of the mail message. These techniques are all well known to one in the art. In this environment, the message 15 arrives at the message server 40 and is redirected by the redirection software 45 to the mobile device 100. As this redirection takes place, the message is re-packaged into an, electronic envelope 80 and a proprietary compression and encryption algorithm can be applied to the original message 15. In this way, messages being read on the mobile device 100 are no less secure then reading them on the desktop workstation 35. All messages exchanged between the redirection software 45 and the mobile device 100 use this message repackaging technique. Another goal of this outer envelope is to maintain the addressing information of the original message. This allows reply messages to reach the appropriate destination, and it allows the “from” field to reflect the mobile user's desktop or message server account address. Using the user's corporate address from the mobile device 100 allows the received message to appear as though the message originated from the user's desktop system 35 rather than the mobile device 100.
Methods 4, 5, 6 and 7 shown in FIG. 2 relate to S/MIME. The methods are all different variations of S/MIME. In method 4, a sender takes a digest of an e-mail message and signs the digest using the sender's private key, as shown at 150. A digest may for example be generated by performing a check-sum, Cyclic Redundancy Check (CRC) or some other preferably non-reversible operation such as a hash on the message, and is then signed by the sender using the sender's private key. The signed digest is appended to the outgoing message, possibly along with the Cert of the sender, and possibly any chained, Certs and CRLs. The receiver of such a signed message also takes a digest of the message, compares this digest with the digest appended to the message, retrieves the sender's public key, usually by extracting the public key from the sender's Cert, and verifies the signature on the appended digest. These operations are part of the signature verification indicated at 155 in FIG. 2. If the message content has been changed since it was signed by the sender, then the digests will be different or the signature on the digest will not verify properly. This does not prevent anyone from seeing the contents of the message, but does ensure the message has not been tampered with since it was signed by the sender, and that the message was signed by the person as indicated on the ‘From’ field of the message. The Cert, Cert chain and CRLs are used by a receiver to ensure that the sender's Cert is valid, i.e. that the Cert has not been revoked or expired, and trusted. The combination of a digest generated at a sender with the signature on the digest is typically referred to as a digital signature. Hereinafter, references to digital signatures should therefore be interpreted as including a digest and a signature of the digest.
Once received by a computer at the host location 30, the message is processed by the message server 40 and routed to each recipients e-mail account on the message server 40. At this point, the redirection software 45 detects the message and re-organizes the message before transmission to the mobile device 100. The main operation is to place the text of the message first, followed by the senders signature (X's Signature) and place the Cert Chain and the CRL last. This re-organized message 310 and possibly the signature 315 is transmitted to each of the recipients that has a mobile devices 100. The signature 315 is a truncated or re-organized form of the original signature, Cert and CRL components 305. In the first transmission, the Certificates and CRLs are stored at the host location 30 and not sent to the mobile device 100. At the mobile devices 100, the users opens the message and select a ‘Verify Signature’ or like menu option or operation for the message. The signature verification uses a local copy of the Cert and CRIB 60, which may have been downloaded earlier through the serial port 50 or received with an earlier message. If the message comes from a user whose Cert and CRL information was not previously loaded onto a mobile devices 100, a user can request that the redirection software 45 send the rest of the message. The second part of the message will contain the Cert and CRL for this sender and will allow the signature to be fully verified.
Still further examples of the wide scope of the system and method disclosed herein are illustrated in FIGS. 17-19. FIGS. 17-19 describe additional uses of the system and method within different exemplary communication systems. FIG. 17 is a block diagram showing an example communication system. In FIG. 17, there is shown a computer system 1702, a WAN 1704, corporate LAN 1706 behind a security firewall 1708, wireless infrastructure 1710, wireless networks 1712 and 1714, and wireless mobile communication devices (“mobile devices”) 1716 and 1718. The corporate LAN 1706 includes a message server 1720, a wireless connector system 1728, a data store 1717 including at least a plurality of mailboxes 1719, a desktop computer system 1722 having a communication link directly to a mobile device such as through physical connection 1724 to an interface or connector 1726, and a wireless Virtual Private Network (VPN) muter 1732. Operation of the system in FIG. 17 will be described below with reference to the messages 1733, 1734 and 1736.
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Soc, US Oct. 19, 1999, pp. 372-377, XP010357040 ISBN: 978-0-7695-0290-8 *the whole document*.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8291212Jan 21, 2010Oct 16, 2012Research In Motion LimitedSystem and method for compressing secure E-mail for exchange with a mobile data communication deviceUS8447980Jan 25, 2010May 21, 2013Research In Motion LimitedSystem and method for processing encoded messages for exchange with a mobile data communication deviceUS8527767Nov 1, 2010Sep 3, 2013Blackberry LimitedSystem and method for processing encoded messages for exchange with a mobile data communication deviceUS8645699 *Mar 15, 2010Feb 4, 2014Blackberry LimitedUse of certificate authority to control a device's access to servicesUS8898473 *Sep 12, 2012Nov 25, 2014Blackberry LimitedSystem and method for compressing secure E-mail for exchange with a mobile data communication deviceUS20110225427 *Mar 15, 2010Sep 15, 2011Research In Motion LimitedUse of certificate authority to control a device's access to servicesUS20130007459 *Sep 12, 2012Jan 3, 2013Research In Motion LimitedSystem and method for compressing secure e-mail for exchange with a mobile data communication device* Cited by examinerClassifications U.S. Classification713/170, 713/157, 713/158, 713/150, 380/270International ClassificationH04L9/32, H04L29/08, G06F13/00, H04L12/18, H04L12/28, G06Q10/00, H04L12/56, H04L12/58, H04L29/06Cooperative ClassificationH04W12/04, H04L51/38, H04L12/5895, H04W12/02, H04L67/2823, H04L67/2828, H04L67/04, H04L63/0442, H04L63/062, H04L63/0428, H04W40/02, H04L12/189, G06Q10/107, H04L69/329, H04L63/126, H04W4/16, H04L63/101, H04L51/066, H04W12/06, H04L12/5835, H04W24/02, H04L9/3247, H04L63/0823European ClassificationH04L29/08N27L, H04W24/02, G06Q10/107, H04L12/58W, H04L12/58C2, H04L29/08N27F, H04L29/08N3, H04W4/16, H04L29/08A7, H04W12/06, H04L63/04B2, H04L63/04B, H04L63/06B, H04L63/08C, H04L51/06BLegal EventsDateCodeEventDescriptionApr 19, 2011ASAssignmentOwner name: RESEARCH IN MOTION LIMITED, CANADAFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GODFREY, JAMES A.;LITTLE, HERBERT A.;SIGNING DATES FROM 20020611 TO 20020612;REEL/FRAME:026150/0782Jun 11, 2014ASAssignmentOwner name: BLACKBERRY LIMITED, ONTARIOFree format text: CHANGE OF NAME;ASSIGNOR:RESEARCH IN MOTION LIMITED;REEL/FRAME:033134/0228Effective date: 20130709RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services