Identification and execution of subsets of a plurality of instructions in a more secure execution environment

Embodiments of apparatus, computer-implemented methods, systems, devices, and computer-readable media are described herein for identifying and encrypting a subset of a plurality of instructions, for execution in a more secure execution environment, In various embodiments, the subset may include a single entry point and a single exit point. In various embodiments, one or more instructions of the plurality of instructions that precede or follow the subset may be executed in a first execution environment with a first security level. In various embodiments, the subset may be executed in a second execution environment with a second security level that is more secure than the first security level.