Flexible instruction sets for obfuscated virtual machines

摘要

A method for protecting computer software code is disclosed. In the embodiment, the method involves receiving instructions corresponding to computer software code for an application, the instructions including a first section of instructions to protect that is indicated by a first indicator and a second section of the instructions to protect that is indicated by a second indicator, rewriting the first section of instructions into a first section of virtual instructions, and rewriting the second section of instructions into a second section of virtual instructions, wherein the first section of instructions includes a first virtual instruction that corresponds to a first handler and the second section of virtual instructions includes a second virtual instruction that corresponds to a second handler, the first handler having different properties than the second handler.

主权项

1. A method for protecting computer software code, the method comprising:
receiving instructions corresponding to the computer software code for an application, the instructions including a first section of instructions to protect that is indicated by a first indicator and a second section of instructions to protect that is indicated by a second indicator; rewriting the first section of instructions into a first section of virtual instructions; and rewriting the second section of instructions into a second section of virtual instructions; wherein the first section of virtual instructions includes a first virtual instruction that corresponds to a first handler and the second section of virtual instructions includes a second virtual instruction that corresponds to a second handler, the first handler having different properties than the second handler, and a property of the first handler corresponds to higher obfuscation and slower execution speed than the second handler.