The RT-1660 features a custom 32-bit RISC-V architecture and provides FIPS 140-3 compliant root-of-trust security designed for mission-critical U.S. Defense applications. It includes hardware implementations of NIST SP800-90a/b/c compliant true random number generator, public key engine supporting RSA up to 8192 bits and ECC up to 521 bits, AES, HMAC, and SHA-2/-3 crypto accelerators. Built for integration into military and government ASICs and FPGAs, it offers superior tamper resistance through Differential Power Analysis (DPA) and fault injection attack (FIA) countermeasures, secure execution of authenticated user applications, tamper detection, and protection of keys and security assets.