Method to Protect Software Against Unwanted Use with a "Renaming" Principle

A system to protect software comprising:

• a first unit which stores a first portion of a software and which comprises a memory and a processor;
• and
• a second unit which stores a second portion of the software and which comprises a secure processor and a secure memory, where the second portion of the software is secret and the first and second portions of the software form a single program,
• wherein the first unit executes the program utilizing the second unit such that during the execution of the program, the first portion of the software executes an instruction directed to the second portion of the software comprising at least one function,
• wherein the instruction comprises an identifier of a function in the second portion of the software, and
• wherein the memory of the second unit stores a reference table in which the identifier of the function in the instruction is correlated to an actual identifier of the function in the second portion of the software.