Mars Research Group, UCI
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AMD introduced Secure Encrypted Virtualization (SEV) in 2016 and has already seen several reincarnations - SEV-ES (encrypted state), and SEV-SNP (secure nested paging). In 2022, AMD introduced Secure Virtual Machine Service Module (SVSM) that can be used to implement secure services for a confidential guest. You can read more about SVSM in their official (draft) specification .