Techniques, methods, systems, and computer-readable media for allocating and managing dynamically obfuscated heap memory allocations are described. In one embodiment a memory manager in a data processing system contains an addressor, to determine a first address of a program object in a first memory address space, and one or more encoders, to abstract memory access to the program object using the first address such that layout of the object data in the first address space differs from the layout of the object in a second address space. In one embodiment, a runtime system modifies object code of an executable file to include encoder routines to abstract memory accesses to data in an obfuscated heap. In one embodiment, a compiler system using an intermediate representation of a high level program generates an intermediate representation of a high level program capable of performing memory writes and memory reads using obfuscation encoder routines.