System for persistently encrypting critical software file to prevent installation of software program on unauthorized computers

• US 6,223,288 B1
• Filed: 05/22/1998
• Issued: 04/24/2001
• Est. Priority Date: 05/22/1998
• Status: Expired due to Term

• Current Assignee: III Holdings 12, LLC (Intellectual Ventures LLC)
• Original Assignee: Protexis, Inc. (Bertelsmann SE & Co. KGaA)
• Inventors: Byrne, Shannon
• Primary Examiner(s): Peeso, Thomas R.
• Application Number:
  US09/083,176
• Time in Patent Office: 1,068 Days
• Field of Search: 380/255, 380/278, 380/279, 380/283, 713/150, 713/165, 713/168, 713/171, 713/190
• US Class Current: 713/190
• CPC Class Codes: G06F 21/121 Restricting unauthorised execution of programs
• CPC Class Codes: G06F 2211/007 Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress

Abstract

A data encryption/decryption system is provided which encrypts a critical file to a software program using an embedded executable. The executable programs a user computer to prompt a user to purchase a license key to decrypt the critical file in order to run the software program.

Claims

1. A method of protecting a software program from piracy, the software program comprising a plurality of program files, the method comprising the steps of:

selecting at least one of said plurality of program files that is required for said software program to successful run on a computer, said computer being connected to memory device, a display device and a user input device;

encrypting said selected file with an embedded executable that is hidden from a user of said computer;

providing said software program comprising said selected file to said computer, said software program being incapable of being executed until said selected file is encrypted;

invoking said embedded executable to obtain a key code to decrypt said selected file and run said software program, said invoking step comprising the step of generating at least one user prompt on said display device using said embedded executable to query said user as to whether running said software progam is desired;

receiving an input signal from said user input device indicating that said user desires decryption of said embedded executable to run said software program;

generating a key request using said computer via said embedded executable;

providing said key request to a remote computer in accordance with said embedded executable; and

transmitting a key to said computer in response to said key request, said key being operable to decrypt said selected file.

2. A method as claimed in claim 1, further comprising the step of performing a payment transaction with said remote computer to purchase said key in accordance with said embedded executable.

3. A system for protecting a software program from piracy comprising:

a consumer computer on which said software program is desired to be run;

an encryption device configured to encrypt a critical file required to successfully run said software program on said consumer computer using an embedded executable and to generate a key to decrypt said critical file;

a server and key database configured to store said key;

a communication link for connecting said consumer computer and said server and key database, said embedded executable being programmed to generate a key request for processing by said server and key database and to receive said key therefrom via said communication link, said consumer computer being operable in accordance with said executable file to decrypt said critical file using said key and to run said software program, said embedded executable being programmed to delete said decrypted critical file after said software program has begun to run.

4. A system as claimed in claim 3, wherein said communication link is at least one of a voice conversation, a facsimile transmission, and an electronic message on at least one of a wireline and a wireless link.

5. A method of protecting a software program from piracy, the software program comprising a ply of program files, the method comprising the steps of:

selecting at least one of said plurality of program files that is required for said software program to successfully run on a computer, said computer being connected to memory device, a display device and a user input device;

encrypting said selected file with an embedded executable that is hidden from a user of said computer;

providing said software program comprising said selected file to said computer, said software program being incapable of being executed until said selected file is encrypted; and

invoking said embedded executable to obtain a key code to decrypt said selected file and run said software program;

wherein said invoking step further comprises the steps of

generating a key request using said computer via said embedded executable;

providing said key request to a remote computer in accordance with said embedded executable; and

transmitting a key to said computer in response to said key request, said key being operable to decrypt said selected file.

6. A method of protecting a software program from piracy, the software program comprising a plurality of program files, the method comprising the steps of:

selecting at least one of said plurality of program files that is required for said software program to successfully run on a computer, said computer being connected to memory device, a display device and a user input device;

encrypting said selected file with an embedded executable that is hidden from a user of said computer;

providing said software program comprising said selected file to said computer, said software program being incapable of being executed until said selected file is encrypted;

invoking said embedded executable to obtain a key code to decrypt said selected file and run said software progam; and

deleting said decrypted embedded executable file from said memory device after said software program is initialized.

7. A method as claimed in claim 6, wherein said selected file is a set-up executable file to install said software program and said deleting step comprises the step of deleting said set-up executable after said set-up executable has been decrypted using said key and used to install said software program.