Instant Retrieval Information System (IRIS) is a hardware subsystem designed to provide IoT devices with secure boot functionality. The author presents an iris can be used to IoT devices, together with a hardware secure boot solution. IRIS has the ability to boot a Linux kernel image that has been pre-stored on removable media. It also has a data validator that ensures the boot process’s secrecy, integrity, and validity. It has been observed that with the use of field programmable gate array chips, IRIS has short boot up times and a tiny hardware footprint. Subsequently, Electronic Linux Unified Key Setup (Embedded LUKS) an open-source crypto-core, can be implemented outside of the boot loading process to add secrecy, integrity, and validity to data saved on off-chip storage, such as a flash device. Thus, IRIS demonstrated an open-source generic solution that can be tailored to many architectures.