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

A computer system comprising:

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

A computer system having an operating system for executing encrypted computer program code, comprising:

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

A digital information product, comprising:

• a computer readable medium with computer readable information stored thereon, wherein the computer readable information comprises:
• a first portion of executable computer program code;
• and
• a second portion of encrypted digital information;
• and
• wherein the first portion of executable program code, when executed, defines means, operative in response to requests for digital information, for accessing the second portion of encrypted digital information, for authorizing decryption, and 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 code, comprising:

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

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

• receiving computer program code having a first portion defining a start up routine, a second portion, and a third portion containing the encrypted executable computer program code;
• executing the first portion of the received computer program code using the processor,
• wherein the step of executing causes the second portion 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 code which are received by the executed second portion, and
• accessing and decrypting the encrypted executable computer program code and returning, using the second portion of the decrypted executable computer program code to the operating system.

A computer system having an operating system, for executing encrypted computer program code, comprising:

• a computer readable medium in which encrypted computer program code is stored in a data file accessible through the operating system, wherein the data file also includes first executable computer program code;
• wherein the operating system is responsive to requests to read, load and execute the first executable computer program code from the data file as a first process having a protected memory area;
• wherein the first process authorizes decryption and decrypts the encrypted computer program code into second executable computer program code and stores the second executable computer program code in the protected memory area;
• and
• wherein the first process causes loading and execution of the second executable computer program code in the protected memory area.

A process for providing access to encrypted digital information while maintaining protection against copying of corresponding decrypted digital information, wherein the encrypted digital information is associated with executable computer program code for decrypting the digital information, the process comprising:

• receiving computer-readable data defining the executable computer program code and the encrypted digital information;
• executing the executable computer program code such that the executable computer program code has a protected memory area;
• authorizing decryption;
• and
• decrypting the encrypted digital information and storing the decrypted digital information in the protected memory area.

A device for providing access to encrypted digital information while maintaining protection against copying of corresponding decrypted digital information, wherein the encrypted digital information is associated with executable computer program code for decrypting the digital information, the device comprising:

• means for receiving computer-readable data defining the executable computer program code and the encrypted digital information;
• means for executing the executable computer program code such that the executable computer program code has a protected memory area;
• means for authorizing decryption;
• and
• means for decrypting the encrypted digital information and storing the decrypted digital information in the protected memory area.