sentence: implementations the following embedded hardware technologies can be used to support tee implementations : amd : platform security processor ( psp ) arm : trustzone intel x86-64 instruction set : sgx software guard extensions mips : virtualization several tee implementations are available from different tee providers : commercial implementations ( t-base , a commercial implementation from trustonic that has been qualified by globalplatform securitee , a commercial implementation from solacia that has been qualified by globalplatform open-source implementations op-tee , an open source implementation from stmicroelectronics under bsd license tlk , an open-source implementation from nvidia under bsd license t6 , and open-source implementation and research topic under gpl license open tee , an open source implementation and research project from the university of helsinki and sponsored by intel .