Software catalog encoding method and system

摘要

A method and system for protecting computer program distribution within a broadcast medium involves encrypting at least a portion of the computer program Si using an encryption scheme keyed to both an encryption key SKi and a program identifier i. Each decryption device (PCDD) also has an associated identifier j. Two tables are generated and stored in a memory device: a first table, including correlations between the encryption key SKi and the program identifier i; and a second table, including correlations between the password key PKj and the hardware identifier j. A password Pij is generated based on both the encryption key SKi and a password key PKi is retrieved from these tables. The password Pij is transmitted to the user for subsequent use in decrypting the subject software program contained on the medium.