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Cross-component cryptographic message syntax message construction

  • US 8,983,070 B2
  • Filed: 11/17/2011
  • Issued: 03/17/2015
  • Est. Priority Date: 11/18/2010
  • Status: Active Grant
First Claim
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1. A method of processing an electronic message, said method comprising:

  • by a mobile wireless communication device;

    detecting receipt of an instruction to transmit a composite message, where said composite message includes a new message and an original message and some parts of said original message are not downloaded to said mobile wireless communication device;

    creating a cryptographic message syntax (CMS) message, said CMS message having a data structure wherein a first field is intentionally left empty;

    transmitting, to a server associated with said mobile wireless communication device, said new message and an encryption request, said encryption request including said CMS message and an indication of said original message;

    obtaining a composite message session key for use in carrying out said encryption request; and

    transmitting, outside of said CMS message, said composite message session key to said server; and

    by said server;

    detecting receipt of said new message and said encryption request;

    creating, responsive to said detecting, said composite message from said new message and said original message;

    processing said composite message to obtain further data;

    inserting said further data into said first field in said data structure in said CMS message; and

    transmitting said CMS message;

    thereby ensuring that said CMS message accurately corresponds to said composite message.

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