公开(公告)号：US20200252207A1

公开(公告)日：2020-08-06

申请号：US16781204

申请日：2020-02-04

申请人： TRUSTONIC LIMITED

发明人： Lukas HANEL ,  Mehdi OUKACHA ,  Baptiste GOURDIN

IPC分类号： H04L9/08 ,  G06F8/65 ,  H04L9/32

摘要： A software decryption key is injected into a computing device 2 having a secure execution environment 20 and a less secure execution environment 22. The key 38 is for decryption of software to be run on the computing device. A key injection software component 36 executed within the secure execution environment 20 is used to control storage of the software decryption key 38 in a protected state in which the software decryption key is unreadable in the clear from the key storage location by an external device or by program code executed in the less secure execution environment 22 of the computing device. Software provided to the device is decrypted based on the injected software decryption key 38.

公开(公告)号：US20210064740A1

公开(公告)日：2021-03-04

申请号：US16836002

申请日：2020-03-31

申请人： Trustonic Limited

发明人： Lukas HANEL ,  Olivier DEPREZ ,  Alexandre GONZALO

IPC分类号： G06F21/53 ,  G06F21/57 ,  G06F9/50 ,  G06F9/38

摘要： A trusted execution environment scheduling method for a device comprising a multicore processor, the processor operable to execute a rich execution environment (REE) and a trusted execution environment (TEE), the method comprising: providing a REE global scheduler in the REE, the REE global scheduler operable to schedule threads for execution in the REE; providing a TEE scheduler in the TEE, the TEE scheduler operable to schedule threads for execution in the TEE, wherein the TEE scheduler determines a number of runnable TEE threads which are either presently, or are awaiting, execution in the TEE and stores the number of runnable TEE threads in a location accessible to threads executing in the REE; providing a plurality of worker threads in the REE, the worker threads being in an activated state or in an deactivated state, wherein when an activated worker thread of the plurality of worker threads is executed according to the schedule of the REE global scheduler the worker thread makes a call to the TEE to cause execution of the TEE on the same core as the worker thread, and wherein the worker thread retrieves the number of runnable TEE threads and compares the retrieved number of runnable TEE threads to the number of currently activated worker threads.