CA2456839A1 - System and method for processing encoded messages - Google Patents

System and method for processing encoded messages Download PDF

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Publication number
CA2456839A1
CA2456839A1 CA002456839A CA2456839A CA2456839A1 CA 2456839 A1 CA2456839 A1 CA 2456839A1 CA 002456839 A CA002456839 A CA 002456839A CA 2456839 A CA2456839 A CA 2456839A CA 2456839 A1 CA2456839 A1 CA 2456839A1
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Canada
Prior art keywords
message
encoded
content portion
memory
communication device
Prior art date
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Granted
Application number
CA002456839A
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French (fr)
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CA2456839C (en
Inventor
Herbert A. Little
Michael S. Brown
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BlackBerry Ltd
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Individual
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Publication of CA2456839A1 publication Critical patent/CA2456839A1/en
Application granted granted Critical
Publication of CA2456839C publication Critical patent/CA2456839C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H04L51/42—Mailbox-related aspects, e.g. synchronisation of mailboxes
    • 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
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3263—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements
    • H04L9/3268—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements using certificate validation, registration, distribution or revocation, e.g. certificate revocation list [CRL]
    • 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
    • H04W12/10—Integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/80—Wireless
    • 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
    • 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
    • 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
    • H04L69/22—Parsing or analysis of headers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • 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
    • H04W28/10—Flow control between communication endpoints
    • H04W28/14—Flow control between communication endpoints using intermediate storage

Abstract

Systems and methods for processing encoded messages at a message receiver. A received encoded message is decoded and stored in a memory. The stored decod ed message can subsequently be displayed or otherwise processed without repeati ng the decoding operations. Decoding operations may include signature verification, decryption, other types of decoding, or some combination there of.

Claims (35)

1. A method for processing encoded messages (604) at a wireless mobile communication device (614), wherein an encoded message (604) is capable of being displayed multiple times at the wireless mobile device (614), said method comprising the steps of:
receiving at the wireless mobile communication device (614) an encoded message (604) comprising at least a message content portion that has been encoded;
receiving a first access request that results in accessing the encoded message content portion (604);
decoding the encoded message content portion to generate a decoded message content portion (616); and storing the decoded message content portion (616) to memory (618);
receiving a subsequent access request to display the message content portion (616) that results in accessing the stored decoded message content portion (616);
wherein the subsequent access request results in at least the second occurrence of displaying the decoded message content portion (616).
2. The method of claim 1, wherein the encoded message (604) is received by the wireless mobile communication device (614) through a wireless infrastructure (90) and a wireless network (105).
3. The method of claim 2, wherein a message server (40) transmits the encoded message (604) through the wireless infrastructure (90) and the wireless network (105) to the wireless mobile communication device (614).
4. The method of claim 3, wherein the message server (40) receives the encoded message (604) from a message sender (602).
5. The method of claim 4, wherein the wireless mobile communication device (614) requests in a pull message access scheme that stored messages be forwarded by the message server (40) to the wireless mobile communication device (614).
6. The method of claim 4, wherein the message server (40) redirects the encoded message (604) to the wireless mobile communication device (614).
7. The method of claim 1, wherein the encoded message (604) comprises an encrypted session key (358), and wherein the encrypted session key (358) is used to decrypt the encoded message content portion, said method further comprising the steps of:
determining whether the encrypted session key (358) has been decrypted and stored to the memory (618); and retrieving the decrypted session key from the memory (618) and using the stored decrypted session key to decrypt the encoded message content portion where the encrypted session key has been decrypted and stored to the memory (618).
8. The method of claim 1, wherein a message server (40) transmits the encoded message (604) through a wireless infrastructure (90) and a wireless network (105) to the wireless mobile communication device (614), wherein the encoded message (604) comprises a plurality of encrypted session keys (358), wherein the message server (40) determines the encrypted session key (358) associated with the wireless mobile communication device (614), and wherein the message server (40) reorganizes the encoded message (604) such that the encoded message (604) is sent to the wireless mobile communication device (614) without containing at least one encrypted session key that is not associated with the wireless mobile communication device (614).
9. The method of claim 1, wherein the encoded message content portion comprises an encoded message body (354).
10. The method of claim 1, wherein the encoded message content portion comprises an encoded message attachment (356).
11. The method of claim 1, wherein the encoded message (604) was encrypted using Secure Multipurpose Internet Mail Extensions (S/MIME) techniques.
12. The method of claim 1, wherein the encoded message (604) was encrypted using Pretty Good Privacy techniques.
13. The method of claim 1, wherein the encoded message (604) was encrypted using OpenPGP techniques.
14. The method of claim 1, wherein the encoded message (604) comprises a digital signature.
15. The method of claim 1, wherein the encoded message (604) comprises an e-mail message.
16. The method of claim 1, wherein the decoded message content portion is removed from the memory (618) after a preselected time has elapsed.
17. The method of claim 16, wherein the preselected time is selected by the user.
18. The method of claim 1, wherein the decoded message content portion is removed from the memory (618) based upon a characteristic associated with the encoded message (604).
19. The method of claim 18, wherein the decoded message content portion is removed from the memory (618) based upon electrical power being removed from the wireless mobile communication device (614).
20. The method of claim 18, wherein the characteristic comprises the identity of a sender (602) of the encoded message (604).
21. The method of claim 20, wherein the identity of the sender (602) of the encoded message (604) comprises an e-mail address of the sender (602).
22. The method of claim 1, wherein the decoded message content portion is removed from the memory (618) based upon a sensitivity level associated with the encoded message (604).
23. The method of claim 22, wherein the sensitivity level is determined based upon a subject line contained within the encoded message (604).
24. The method of claim 22, wherein the sensitivity level is determined based upon the message content portion.
25. The method of claim 1, further comprising the step of:
setting a disabling flag so that the decoded message content portion is not continuously stored in the memory (618) for use in subsequent accesses of the message content portion.
26. The method of claim 1, further comprising the step of:
setting a disabling flag so that the decoded message content portion (616) is removed from the memory (618) after accessing the message content portion.
27. The method of claim 1, wherein the decoded message content portion (616) is stored to a volatile memory of the wireless mobile communication device (614).
28. The method of claim 1, wherein the decoded message content portion (616) is stored to a volatile and non-persistent memory of the wireless mobile communication device (614).
29. The method of claim 1, wherein the decoded message content portion (616) is stored to a random access memory (RAM) of the wireless mobile communication device (614).
30. An apparatus on a wireless mobile communication device (614) for displaying multiple times an encoded message (604), wherein the encoded message (604) contains encoded content and further includes accessing information that is transmitted to the wireless mobile communication device (614), the apparatus comprising:
a storage software module (622) that stores a decoded version (616) of the encoded content as well as the accessing information in memory (618) which is volatile and non-persistent, wherein the accessing information allows access to the decoded content (616); and an accessing software module (702) that retrieves from the memory (618) the accessing information and the decoded content (710) in response to multiple message access requests concerning the content of the encoded message (604), wherein the access requests result in displaying multiple times the content of the encoded message (604).
31. The apparatus of claim 32, wherein the accessing information comprises a session key (358) to access the encoded content.
32. The apparatus of claim 32, wherein the encoded message (604) further comprises a digital signature (360), wherein the storage software module (622) stores, in the memory (618), verification information about the digital signature (360), and wherein the accessing software module (702) retrieves from the memory (618) the verification information when the content is accessed multiple times.
33. The apparatus of claim 34, further comprising a data structure (620) stored in the memory (618) for containing the accessing information.
34. The apparatus of claim 35, wherein the wireless mobile communication device (614) receives a plurality of encoded messages (604), and wherein the data structure (620) associates which accessing information is associated with which message.
35. The apparatus of claim 36, wherein the data structure (620) associates which verification information is associated with which message.
CA2456839A 2001-08-06 2002-08-06 System and method for processing encoded messages Expired - Lifetime CA2456839C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US31033001P 2001-08-06 2001-08-06
US60/310,330 2001-08-06
PCT/CA2002/001225 WO2003015367A2 (en) 2001-08-06 2002-08-06 System and method for processing encoded messages

Publications (2)

Publication Number Publication Date
CA2456839A1 true CA2456839A1 (en) 2003-02-20
CA2456839C CA2456839C (en) 2010-05-18

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CA2456839A Expired - Lifetime CA2456839C (en) 2001-08-06 2002-08-06 System and method for processing encoded messages

Country Status (11)

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US (2) US8019081B2 (en)
EP (1) EP1417814B1 (en)
CN (2) CN101232504B (en)
AT (1) ATE413046T1 (en)
AU (1) AU2002322869A1 (en)
BR (1) BRPI0211756B1 (en)
CA (1) CA2456839C (en)
DE (1) DE60229645D1 (en)
ES (1) ES2315379T3 (en)
HK (1) HK1062507A1 (en)
WO (1) WO2003015367A2 (en)

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US8661267B2 (en) 2014-02-25

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