Computer system and process for accessing an encrypted and self-decrypting digital information product while restricting access to decrypted digital information

A digital information product including a computer readable medium having digital information stored thereon, the digital information including computer program logic defining first executable computer program logic, wherein the first executable computer program logic when executed performs the following steps:

• storing the encrypted computer program logic in a data file accessible through an operating system of a computer, wherein the data file also includes first executable computer program logic;
• through the operating system, reading, loading and executing the first executable computer program logic from the data file as a first process having a protected memory area;
• the first process decrypting the encrypted computer program logic into second executable computer program logic and storing the second executable computer program logic in the protected memory area;
• and
• the first process causing loading and execution of the decrypted second computer program logic in the protected memory area.

A computer system comprising:

• a processor for executing computer program logic;
• a main memory operatively connected to the processor for storing digital information including executable computer program logic at memory locations addressed by the processor;
• and
• an operating system defined by executable computer program logic stored in the memory and executed by the processor and having a command which when executed by the processor defines means for creating a process in response to a request specifying a process identifier and a memory location in the main memory, wherein the process identifier indicates the process making the request and the memory location stores executable computer program logic which when executed defines the process.

A computer system having an operating system, for decrypting digital information, comprising:

• means for storing the encrypted computer program logic in a data file accessible through the operating system, wherein the data file also includes first executable computer program logic;
• means, invokable through the operating system, for reading, loading and executing the first executable computer program logic from the data file as a first process having a protected memory area;
• the first process defining means for decrypting the encrypted computer program logic into second executable computer program logic and storing the second executable computer program logic in the protected memory area;
• and
• the first process defining means for causing loading and execution of the decrypted second computer program logic in the protected memory area.

A digital information product, including a computer readable medium with computer readable information stored thereon, wherein the computer readable information comprises:

• a first portion of executable computer program logic;
• and
• a second portion of encrypted digital information;
• and
• wherein the first portion of executable program logic, when executed, defines means, operative in response to requests for digital information, for accessing the second portion of encrypted digital information, for decrypting the encrypted digital information, and for outputting the decrypted digital information.

A computer program product including a self-decrypting encrypted executable computer program, comprising:

• a computer readable medium having computer program logic stored thereon, wherein the computer program logic defines:
• a first module,
• a second module,
• wherein the first module, when executed by a computer, defines means for loading the second module into memory of the computer, and
• a third module defining the encrypted executable computer program,
• wherein the second module, when executed by a computer, defines means for communicating with an operating system of the computer to receive requests for program code from the encrypted executable computer program from the third module, and for processing the requests to access and decrypt the encrypted executable computer program and for providing the decrypted executable code from the third module to the operating system.

A process for executing encrypted executable computer programs on a computer system having a processor, memory and operating system, comprising the steps of:

• receiving computer program logic having a first module defining a start up routine, a second module, and a third module containing the encrypted executable computer program;
• executing the first module of the received computer program logic using the processor,
• wherein the step of executing causes the second module to be loaded into the memory of the computer system, and
• generating requests from the operating system for data from the encrypted executable computer program which are received by the second module, and
• accessing and decrypting the encrypted executable computer program and returning the decrypted executable computer program to the operating system.