1

According to my knowledge, several obfuscation strategies are widely used(or at least described in academic) like:

  • complicating control flow

    1. inserting bogus control-flow
    2. control-flow flattening
    3. jump through branch functions
    4. opaque values from array aliasing
  • Opaque Predicates

    1. opaque predicates from pointer aliasing
  • dynamic obfuscation

    1. self-modifying state machine
    2. code as key material

From the examples they give when introducing these obfuscation ways, multi-thread program has not been talked.

So I am wondering whether these strategies are feasible(or even feasible, but not very practical) in multi-thread programs?

2

All of them are feasible. By definition obfuscating code transformation is transformation that preserves functional equivalency of obfuscated program, so there is no any difference between multi-thread and single-thread programs from this point of view.

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