| 摘要 |
Software is protected by providing an incomplete copy for loading into RAM (30). One or more blocks of code (32) are missing. The choice and location of the missing code (32) is preferable substantially random. Thus, the RAM portion (30) contains an incomplete copy of the protected software, lacking additional code to be executable. The code which is missing at (32) is located elsewhere, indicated at (36), and maybe within or external to the computer (10). A control routine (34) is operable to retrieve the missing code (32) from the location (36) when the protected software is to be executed, and to incorporate the additional code into the protected software at (32), to render the protected software fully executable.
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