Breaking abstractions and unstructuring data structures

  • Collberg C
  • Thomborson C
  • Low D
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To ensure platform independence, mobile programs are distributed
in forms that are isomorphic to the original source code. Such codes are
easy to decompile, and hence they increase the risk of malicious reverse
engineering attacks. Code obfuscation is one of several techniques which
has been proposed to alleviate this situation. An obfuscator is a tool
which-through the application of code transformations-converts a program
into an equivalent one that is more difficult to reverse engineer. In a
previous paper (Collberg et al., 1998) we have described the design of a
control flow obfuscator for Java. In this paper we extend the design
with transformations that obfuscate data structures and abstractions. In
particular we show how to obfuscate classes, arrays, procedural
abstractions and built-in data types like strings, integers and booleans

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