System and method for using digital strings to provide secure distribution of digital content

• US 7,720,765 B1
• Filed: 07/20/2006
• Issued: 05/18/2010
• Est. Priority Date: 07/20/2006
• Status: Expired due to Fees

• Current Assignee: Bluemont Software, Inc.
• Original Assignee: Vatari Corporation
• Inventors: Pesl, Marek
• Primary Examiner(s): Fischer; Andrew J.
• Assistant Examiner(s): Coppola; Jacob C.
• Application Number:
  US11/458,800
• Time in Patent Office: 1,398 Days
• Field of Search: 705 50- 79
• US Class Current: 705/54
• CPC Class Codes: G06F 21/1011 to devices
• CPC Class Codes: G06F 21/1083 Partial license transfers

Abstract

A method and system for secure distribution of digital content, using a disintegration tool under control of a distributor of the digital content to divide the digital content into protected and unprotected segments, delivering the unprotected segments to the customer along with installation software and identification information. The segments to be protected are modified using the identification information on the distribution medium and hardware information unique to a particular customer device. Upon communication of this information from the customer device, the modified segments are sent to the customer device for integration with the unprotected segments to generate a modified digital content operable only on the particular customer device.

Claims

1. A computer implemented method for secure distribution of digital content, the method comprising:

disintegrating, by a hardware server, the digital content into a plurality of segments;

selecting, from the plurality of segments, segments to be protected, the remaining unselected segments to be being-unprotected;

including the remaining unselected segments in a medium for distribution, the selected segments to be protected being omitted from the medium for distribution, the medium also including installation software and distribution identification information;

receiving the remaining unselected segments, the installation software, and the distribution identification information on a particular customer device;

executing the installation software on the particular customer device, the installation software extracting from the particular customer device hardware identification information unique to the particular customer device;

receiving, by the hardware server, the distribution identification information and the unique hardware identification information extracted from the particular customer device, the distribution identification information identifying the selected segments to be protected;

modifying, by the hardware server, the selected segments to be protected so as to include the distribution identification information and the hardware identification information unique to the particular customer device, the modifying further comprising;

confirming the distribution identification information, and for each segment of the selected segments to be protected;

replacing an assembler level call instruction with a pointer to a call protection routine; and

altering one or more assembler level instructions that follow the replaced call instruction;

injecting, by the hardware server, the modified segments to the particular customer device;

integrating, on the particular customer device, the remaining unselected segments with the modified segments, thereby generating on the particular customer device modified digital content operable only on the particular customer device; and

executing the call protection routine on the particular customer device, the executing further comprising;

confirming that hardware components corresponding to the hardware identification information are present on the particular customer device; and

in response to said confirming, restoring the replaced assembler level call instruction and the altered one or more assembler level instructions that follow the replaced call instruction.

2. The method of claim 1, wherein the unique hardware identification information is obtained by the hardware server over the Internet in a transmission from the particular customer device, under direction from the installation software made resident on the customer device from the medium used for distribution.

3. The method of claim 1, wherein the injecting step further comprises:

transmitting the modified segments to the particular customer device over the Internet in response to an authorization request from the particular customer device; and

the integrating step further comprises;

combining the unprotected segments and the modified segments at the particular customer device to produce a load file, the load file being able to generate an executable for running the digital content.

4. The method of claim 1, wherein the restored assembler level instructions are written to a run time program in memory.