System and method of cross-component message processing

• US 8,538,022 B2
• Filed: 06/04/2009
• Issued: 09/17/2013
• Est. Priority Date: 06/04/2009
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Tu, Van Quy, Adams, Neil Patrick
• Primary Examiner(s): SHAW, PETER C
• Application Number:
  US12/478,243
• Publication Number:
  US 20100310073A1
• Time in Patent Office: 1,566 Days
• Field of Search: 709/235, 380/270, 713/176
• US Class Current: 380/270
• CPC Class Codes: H04L 51/58 Message adaptation for wireless communication
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/12 Applying verification of the received information cryptographic mechanisms or cryptographic arrangements for data integrity or data verification H04L9/32
• CPC Class Codes: H04W 12/02 Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
• CPC Class Codes: H04W 12/033 of the user plane, e.g. user's traffic
• CPC Class Codes: H04W 12/10 Integrity

Abstract

Often, for reasons of wireless bandwidth conservation, incomplete messages are provided to wireless messaging devices. Employing cryptography, for secrecy or authentication purposes, when including a received message that has been incompletely received can lead to lack of context on the receiver'"'"'s end. By automatically obtaining the entirety of the message to be included, an outgoing message that includes the received message can be processed in a manner that securely and accurately represents the intended outgoing message.

Claims

1. A mobile wireless communication device comprising:

a processor adapted to;

detect receipt of an instruction to sign a response message, where said response message includes a new portion and a truncated portion of a preceding message;

amend said response message to include a disclaimer, thereby producing an amended response message, said disclaimer marking an end of a part of the message signed at said mobile wireless communication device;

generate, using a hashing algorithm and based on said amended response message, a primary hash;

transmit a processing request to a server associated with said mobile wireless communication device, said request including a context for said hashing algorithm;

receive, from said server, a secondary hash;

encrypt said secondary hash to form a digital signature;

transmit said amended response message to said server; and

transmit said digital signature to said server associated with said amended response message.

2. A non-transitory computer-readable storage medium containing computer-executable instructions that, when performed by a processor for a mobile wireless communication device, cause said processor to:

detect receipt of an instruction to sign a response message, where said response message includes a new portion and a truncated portion of a preceding message;

amend said response message to include a disclaimer, thereby producing an amended response message, said disclaimer marking an end of a part of the message signed at said mobile wireless communication device;

generate, using a hashing algorithm and based on said amended response message, a primary hash;

transmit a processing request to a server associated with said mobile wireless communication device, said request including a context for said hashing algorithm;

receive, from said server, a secondary hash;

encrypt said secondary hash to form a digital signature;

transmit said amended response message to said server; and

transmit said digital signature to said server associated with said amended response message.

3. At a mobile wireless communication device, a method of processing an electronic message, said method comprising:

detecting receipt of an instruction to sign a response message, where said response message includes a new portion and a truncated portion of a preceding message;

responsive to said detecting, amending said response message to include a disclaimer, thereby producing an amended response message, said disclaimer marking an end of a part of the message signed at said mobile wireless communication device;

generating, using a hashing algorithm and based on said amended response message, a primary hash;

transmitting a processing request to a server associated with said mobile wireless communication device, said request including a context for said hashing algorithm;

receiving, from said server, a secondary hash;

encrypting said secondary hash to form a digital signature;

transmitting said amended response message to said server; and

transmitting said digital signature to said server associated with said amended response message.

4. The method of claim 3 wherein said disclaimer comprises the text “

—

end of device-signed data—

”

.