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Asked: 2026-05-11T15:29:17+00:00

I’ve wondered for some time how some software hides secret keys in such a

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I’ve wondered for some time how some software hides secret keys in such a way that they can’t be trivially discovered. Just a few examples:

  • DVD Player Software hides CSS keys
  • Software with serial numbers/registration codes hides keys/hashes used to validate the serial numbers

Obviously, these programs do something more than just have the key in a byte[], as that would make it easy to steal their keys and generate your own serial numbers, etc.

What sorts of strategies are used to hide these keys so that they can’t be found easily?

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  1. The reasons those secret keys were so easily discovered is because they were hidden in software.

    Avoid hiding secrets in software at all cost – obfuscation will only get you so far. Ask yourself this: How well can I hide a key in software from someone with full access to the disassembly, user mode and kernel mode debuggers, and no day job? It’s only a matter of time before it gets cracked.

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