A technique to provide an integrated circuit that performs memory partitioning to partition a memory into a plurality of regions, in which the memory is accessed by a plurality of heterogeneous processing devices that operate to access the memory. The integrated circuit also assigns a security level for each region of the memory and permits a memory access by a transaction to a particular region of the memory, only when a level of security assigned to the transaction meets or exceeds the assigned security level for the particular region. The integrated circuit also performs sandboxing by assigning which of the plurality of processing devices are permitted access to each of the plurality of regions. The integrated circuit may implement only the security level function or only the sandboxing function, or the integrated circuit may implement them both. In some instances, a scrambling/descrambling function is included to scramble/descramble data. In one application, the integrated circuit is included within a mobile phone.