Sifive’s RISC V specialists are committed to providing crypto engines, key management, storage isolation and many more security features in their SoC designs. The Sifive Shield initiative is ambitious and offers competition to modern ARM and x86 chips.
article (in German): https://www.golem.de/news/shield-sifive-baut-hardware-crypto-und-security-fuer-risc-v-socs-1910-144604.html