Which processor security feature provides hardware based encryption of system memory to protect sensitive information from physical memory extraction?

Role Based Access Control (RBAC) is a software-based access control mechanism that restricts system access to authorized users based on their roles, not a hardware feature for memory encryption.

AMD Secure Memory Encryption (SME), and its newer variant Secure Encrypted Virtualization (SEV), are processor features that encrypt all or part of system memory using hardware-based keys. This protects data in memory from unauthorized access, such as physical memory extraction attacks or snooping, even if the OS or hypervisor is compromised.

Software Guard Extensions (SGX) is an Intel technology that allows applications to create protected enclaves in memory for secure code and data execution, but it's focused on protecting specific application code/data, not the entire system memory from physical extraction.

Separation Kernel Protection Profiles (SKPP) are security certification standards for high-assurance operating systems and hypervisors, not a specific processor security feature for memory encryption.