PPC-PROTECT - the system of software protection for Windows CE (PocketPC) applications with ARM core, designed for quick implementation of application protection functions. PPC-PROTECT is designed for such specific tasks as working with registration keys and creation of trial application versions. PPC-PROTECT includes the following features: - compression of the executable code and resources - encryption of the application - counteraction to debuggers and disassemblers - API for interaction between application and protection routines - possibility to create evaluation (trial) versions, that limits application functions basing on evaluation time, expose nag-screens - generating of registration keys, based on the unique device identifier - external serial number generator with keygen interface