Method and system for the secured distribution of multimedia titles

A data processing system for detecting unauthorized programs within the data processing system, the data processing system comprising:

• creation means for creating a validation structure for validating a program including program data, wherein the structure includes data derived from data selected from a portion portions of the program data including sections other than a lead-in section of the program data, wherein the structure may be used to determine whether the program is an unauthorized program;
• imbedding means for imbedding the validation structure in the program;
• and
• determination means, responsive to an initiation of the program, for determining whether the program is an unauthorized program.

A method in a data processing system for creating a validation structure for use in validating a program, the method comprising:

• selecting a plurality of sections including sections other than a lead-in section from within the program, each section within the plurality of sections containing program data;
• creating a cryptographic hash value for each selected section from the program data within the plurality of selected sections within the program;
• and
• storing the cryptographic hash value and a location for each selected section as a data record within a validation structure, wherein the location is a location of the selected section within the program.

A data processing system for creating a validation structure for use in validating a program, the data processing system comprising:

• random selection means for randomly selecting a plurality of sections including sections other than a lead-in section from within the program, each selected section within the plurality of randomly selected sections containing program data;
• creation means for creating a cryptographic hash value for program data within each selected section from within the plurality of randomly selected sections within the program;
• and
• storage means for storing the cryptographic hash value and a location value for each selected section as a data record within a validation structure, wherein the location is a location of the selected section within the program.

A method in a data processing system for validating a program, wherein the program includes a validation structure having a plurality of data records, wherein each data record within the plurality of data records includes a cryptographic hash value for program data within a section selected from sections including sections other than a lead-in section of the program and a location value, wherein the location value indicates a location of the selected section, the method comprising:

• randomly selecting a number of data records from within the validation structure;
• creating a cryptographic hash value on program data within the section in the location indicated by the location value for the randomly selected data record for each randomly selected data record;
• and
• comparing the created cryptographic hash value with the hash value within the randomly selected data record.

A data processing system for validating a program, wherein the program includes a validation structure having a plurality of data records, wherein each data record within the plurality of data records includes a cryptographic hash value for program data within a section selected from sections including sections other than a lead-in section of the program and a location value, wherein the location value indicates a location of the selected section, the data processing system comprising:

• random selection means for randomly selecting a number of data records from within the validation structure;
• creation means for creating a cryptographic hash value on program data within the section in the location indicated by the location value for the randomly selected data record for each randomly selected data record;
• and
• comparison means for comparing the created cryptographic hash value with the hash value within the randomly selected data record.

A storage device readable by a data processing system and encoding data processing system executable instructions comprising:

• selections means for selecting a plurality of sections including sections other than a lead-in section from within a program containing program data;
• creation means for creating a cryptographic hash value for program data within each selected section from the plurality of selected sections within the program;
• and
• storage means for storing the cryptographic hash value and a location value for each selected section as a data record within a validation structure, wherein the location is a location of the selected section within the program, wherein the means are activated when the storage device is connected to and accessed by a data processing system.