• ARM TrustZone's Secure/Normal world vs x86's Ring0/3 or OS's kernel/user mode?
    I read document like this TrustZone Security Whitepaper . It describes that all resources like CPU, memory and others are divided by Secure World and Normal World . Programs in Normal World can not access...
  • Can the linux  boot up without arm-trusted-firmware if the trustzone is not necessary ?
    Hi experts,      I am trying to boot the linux by my bootloader which is running on EL3 level.(switch to EL1 when I jump to the kernel)      The trustzone is not necessay for me, so I don't want to use...
  • Using ARM TrustZone OS in the UEFI
    I think community is familiar with a BIOS's replacement which is UEFI. I found that UEFI contains the module with name SMM (System Management Mode), which is running at the highest priority exception...
  • MPU vs TrustZone-M
    When you are securing a firmware or an application code , it boils down to protecting the portion of memory with MPU. When and why would I use TrustZone-M for securing the firmware when I can actually...
  • JTAG to TrustZone Cortex-M33
    Hey evryone, I have a question in component security context. I program my MCU from a JTAG port. I also have a secure UART device in RX to display in hyper terminal. Can an attacker get access to...