CA2450601A1 - System and method for compressing secure e-mail for exchange with a mobile data communication device - Google Patents

System and method for compressing secure e-mail for exchange with a mobile data communication device Download PDF

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Publication number
CA2450601A1
CA2450601A1 CA002450601A CA2450601A CA2450601A1 CA 2450601 A1 CA2450601 A1 CA 2450601A1 CA 002450601 A CA002450601 A CA 002450601A CA 2450601 A CA2450601 A CA 2450601A CA 2450601 A1 CA2450601 A1 CA 2450601A1
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Canada
Prior art keywords
message
encrypted
reduced size
receiver
session key
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Granted
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CA002450601A
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French (fr)
Other versions
CA2450601C (en
Inventor
James A. Godfrey
Herbert A. Little
Michael K. Brown
Neil P. Adams
Carl L. Cherry
Timothy R. Tyhurst
Michael S. Brown
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BlackBerry Ltd
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Individual
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Publication of CA2450601C publication Critical patent/CA2450601C/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/10—Office automation; Time management
    • G06Q10/107—Computer-aided management of electronic mailing [e-mailing]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/06—Message adaptation to terminal or network requirements
    • H04L51/066—Format adaptation, e.g. format conversion or compression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H04L63/045—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply hybrid encryption, i.e. combination of symmetric and asymmetric encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/06—Network architectures or network communication protocols for network security for supporting key management in a packet data network
    • H04L63/062—Network architectures or network communication protocols for network security for supporting key management in a packet data network for key distribution, e.g. centrally by trusted party
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/12—Applying verification of the received information
    • H04L63/126—Applying verification of the received information the source of the received data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/04—Protocols specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/565—Conversion or adaptation of application format or content
    • H04L67/5651—Reducing the amount or size of exchanged application data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/04—Protocols for data compression, e.g. ROHC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H04W12/033—Protecting confidentiality, e.g. by encryption of the user plane, e.g. user's traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/10—Integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2463/00—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00
    • H04L2463/062—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00 applying encryption of the keys
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
    • H04L51/58—Message adaptation for wireless communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H04L63/0442—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
    • H04L63/101—Access control lists [ACL]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold

Abstract

A 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 determination as to whether any of the message receivers has a corresponding wireless mobile communication device. For each message receiver that has a corresponding wireless mobile communication device, the message is processed so as to modify the message with respect to encryption and/or authentication aspect. The processed message is transmitted to a corresponding wireless mobile communication device. The system and method may include post-processing messages sent from a wireless mobile communications device to a remote system. Authentication and/or encryption message processing is performed upon the message. The processed message may then be sent through the remote system to one or more receivers.

Claims (24)

  1. WHAT IS CLAIMED AS THE INVENTION IS:

    I. A method of reducing the size of an encrypted message at a host system before the message is transmitted to a wireless mobile communication device, the method comprising the steps of:

    (a) receiving at the host system an encrypted message from a message sender addressed to first and second message receivers, the encrypted message including an encrypted message body and an encrypted session key for each of the message receivers;

    (b) generating at the host system a first reduced size encrypted message that contains the encrypted message body and the encrypted session key for the first message receiver, the first reduced size encrypted message not including the encrypted session key for the second message receiver; and (c) transmitting the first reduced size encrypted message to a wireless mobile communication device that corresponds to the first message receiver, wherein the encrypted sessions keys were encrypted via public keys that are electronically available from different companies over a network to which the host system is connected.
  2. 2. The method of claim 1, wherein the step of generating a first reduced size encrypted message comprises the step of removing an encrypted session key other than the encrypted session key for the first message receiver in order to form the first reduced sized encrypted message.
  3. 3. The method of claim 1, wherein the step of generating a first reduced size encrypted message comprises the step of removing all encrypted session keys other than the encrypted session key for the first message receiver iii order to form the first reduced size encrypted message.
  4. 4. The method of claim 3, wherein the step of generating a first reduced size encrypted message comprises the step of removing a message receiver information field of the message which snags each encrypted session key to a message recipient.
  5. 5. The method of claim 1 wherein:

    the receiving step (a) comprises the step of receiving at the host system an encrypted message front a message sender addressed to a plurality of message receivers, the encrypted message including an encrypted message body and an encrypted session key for each message receiver;

    the method further comprises the step of determining whether any of the message receivers has a corresponding wireless mobile communication device;

    the generating step (b) comprises the step of, for each message receiver that has a corresponding wireless mobile communication device, generating a reduced size enctypted message containing the encrypted message body and the encrypted session key only for the message receiver; and the transmitting step (c) comprises the step of transmitting the reduced size encrypted message to the wireless mobile communication device.
  6. 6. The method of claim 5, wherein a sine address is shared by a message receiver and a corresponding wireless mobile communication device.
  7. 7. The method of claim 5, wherein each encrypted session key is encrypted using a public key of a message receiver, and a message receiver and a corresponding wireless mobile communication device share the public key and an associated private key.
  8. 8. The method of claim 1, wherein the encrypted message is a message that has been signed and then encrypted, and further includes an encrypted distal signature;
    and the step of generating a first reduced size encrypted message comprises the step of generating a reduced size encrypted message containing the encrypted message body, the encrypted digital signature and the encrypted session key for the first message receiver.
  9. 9. The method of claim 8, wherein:

    the encrypted message ftuthex comprises encrypted signature-related information; and the step of generating a first reduced size encrypted message comprises the step of generating a reduced size encrypted message containing the encrypted message body, the encrypted digital signature, the encrypted signature-related information and the encrypted session key for the first message receiver.
  10. 10. The method of claim 1, wherein the encrypted message is a Secure Multipurpose Internet Mail Extensions (S/MIME) e-mail message.
  11. 11. The method of claim 1, wherein the encrypted message is encrypted according to Pretty Good Privacy (PGP), and wherein a second encrypted message is handled by the host system for transmission to the wireless mobile communication device, wherein the second encrypted message is a Secure Multipurpose Internet Mail Extensions (S/MIME) e-mail message.
  12. 12. A first reduced size encrypted message generated in accordance with the method of claim 1.
  13. 13. A system for reducing the size of an encrypted message for transmission to a wireless mobile communication device, the system comprising:

    a host system configured to receive an encrypted message from a message sender and addressed to message receivers, the encrypted message including an encrypted message body and an encrypted session key for each message receiver; and a wireless connector system associated with the host system and configured to determine whether any of the message receivers has a corresponding wireless mobile communication device and if so, for each message receiver that has a corresponding wireless mobile communication device, to generate a reduced size encrypted message containing the message body and the encrypted session key only for the message receiver and to transmit the reduced size encrypted message to the wireless mobile communication device, wherein at least two of the encrypted session keys for the message receivers were encrypted via public keys that are electronically available from different companies over a network to which the host system is connected.
  14. 14. The system of claim 13, wherein the host systems comprises a message server system.
  15. 15. The system of claim 14, wherein the message server system is implemented in a secure network behind a network security firewall.
  16. 16. The system of claim 13, wherein the host system comprises a desktop computer system or a laptop computer system.
  17. 17. The system of claim 13, wherein a network operator infrastructure enables wireless information exchange between the host system and wireless mobile communication devices.
  18. 18. A system for reducing the size of an encrypted message at a host system before the message is transmitted to a wireless mobile communication device, said system comprising:
    means for receiving at the host system an encrypted message from a message sender addressed to first and second message receivers, the encrypted message including an encrypted message body and an encrypted session key for each of the message receivers;
    means for generating at the host system a first reduced size encrypted message that contains the encrypted message body and the encrypted session key for the first message receiver, the first reduced size encrypted message not including the encrypted session key for the second message receiver; and means for transmitting the first reduced size encrypted message to a wireless mobile communication device that corresponds to the first message receiver, wherein the encrypted session keys were encrypted via public keys that are electronically available from different companies over a network to which the host system is connected, and wherein different electronic security messaging approaches are used to encrypt messages sent to the host system.
  19. 19. A wireless device comprising memory for storing a first reduced size encrypted message, wherein the first reduced size encrypted message was generated by a remote system based upon an encrypted message provided to the remote system from a message sender, said encrypted message from the message sender having contained addresses to first and second message receivers, the sender's encrypted message including an encrypted message body and an encrypted session key for each of the message receivers, wherein the first reduced size encrypted massage contains the encrypted message body and the encrypted session key for the first message receiver, the first reduced size encrypted message sent by the remote system to the wireless device not including the encrypted session key for the second message receiver, wherein the encrypted session keys were encrypted via public keys that are electronically available from different companies over a network to which the host system is connected.
  20. 20. The wireless device of claim 19 wherein the wireless device has an association with the first message receiver, said association indicating that the wireless device is to receive messages sent to the first message receiver.
  21. 21. The wireless device of claim 19 wherein the remote system comprises host system means.
  22. 22. The wireless device of claim 19 wherein the host system means comprises wireless connection system means.
  23. 23. A computer data signal embodied in a carrier wave comprising a first reduced size encrypted message, wherein the first reduced size encrypted message was generated by a remote system based upon as encrypted message provided to the remote system from a message sender, said encrypted message from the message sender having contained addresses to first and second message receivers, the sender's encrypted message including an encrypted message body and an encrypted session key for each of the message receivers, wherein the first reduced size encrypted message contains the encrypted message body and the encrypted session key for the first message receiver, the first reduced size encrypted message sent by the remote system to the wireless device not including the encrypted session key fox the second message receiver, wherein the encrypted session keys were encrypted via public keys that ate electronically available from different companies over a network to which the host system is connected.
  24. 24. A method of processing an encoded message at a host system before the message is transmitted to a wireless mobile communication device, the method comprising the steps of:
    receiving at the host system the encoded message from a message sender addressed to a plurality of message receivers;
    wherein at least portions of the encoded message were encoded via electronic asymmetric security keys that are electronically available from different companies over a network to which the host system is connected;
    determining whether any of the message receivers has a corresponding wireless mobile communication device; and for each message receiver that has a corresponding wireless mobile communication device:
    processing the message so as to modify the message with respect to an encoding aspect, said encoding aspect being selected from the soup consisting of an encryption aspect, an authentication aspect, and combinations thereof; and transmitting the processed message to the corresponding wireless mobile communication device.
CA2450601A 2001-06-12 2002-06-12 System and method for compressing secure e-mail for exchange with a mobile data communication device Expired - Lifetime CA2450601C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US29768101P 2001-06-12 2001-06-12
US60/297,681 2001-06-12
US36553502P 2002-03-20 2002-03-20
US60/365,535 2002-03-20
PCT/CA2002/000889 WO2002101605A2 (en) 2001-06-12 2002-06-12 System and method for compressing secure e-mail for exchange with a mobile data communication device

Publications (2)

Publication Number Publication Date
CA2450601A1 true CA2450601A1 (en) 2002-12-19
CA2450601C CA2450601C (en) 2012-10-16

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Family Applications (1)

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CA2450601A Expired - Lifetime CA2450601C (en) 2001-06-12 2002-06-12 System and method for compressing secure e-mail for exchange with a mobile data communication device

Country Status (8)

Country Link
US (4) US7254712B2 (en)
EP (2) EP1410293A2 (en)
JP (1) JP3926792B2 (en)
KR (1) KR100565916B1 (en)
AU (1) AU2002311039A1 (en)
CA (1) CA2450601C (en)
IL (2) IL159341A0 (en)
WO (1) WO2002101605A2 (en)

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