A system-on-chip (SoC) is a single chip that combines a processor with other major computing functions, such as graphics, memory controllers, storage interfaces, and network or device I/O. In compact boards and embedded devices, an SoC can replace several separate chips, reducing power use, space, and cost while still delivering a full computing platform.
In cyber security, SoCs matter because they concentrate both capability and risk. Their firmware, boot ROM, trusted execution features, and hardware accelerators can protect a device through secure boot and isolation, but they also create a large attack surface if misconfigured or vulnerable. Real attacks often target SoC boot chains, debug ports, or vendor firmware to gain persistent control. Defenders review SoC documentation, update firmware, disable unused interfaces, and verify that security features like hardware root of trust are actually enabled.