Any experiences about BLE security with Arduino?

I have been reading a lot about BLE security lately. But, I have found only a bunch of links talking about doing something concrete around ble security: 2. ble security vulnerabilities 3. Open source...
Is it possible to set a memory region from non-secure to secure at runtime?

This question was raised in the ' How to implement a secure IoT system on ARMv8-M ' webinar, view all the questions in the round up blog post .
What sort of visibility does a non-secure debugger have of the secure sections?

This question was raised in the ' How to implement a secure IoT system on ARMv8-M ' webinar, view all the questions in the round up blog post .
Does Aarch64 LDTR behave differently in secure vs non-secure?

Can LDTR be used to test requests from secure EL0 or are all results taken in the context of NS EL0?
GIC-400 non-secure access

Hi, experts I'm the new one porting armv8 linux. I have some problem about gic400 access. In the porting linux progress,CPU will switch to EL1NS. In gic_dist_init() function, I read the the GICD_ISENABLERn...