[HN Gopher] Exploring TrustZone-M on the NRF9160
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       Exploring TrustZone-M on the NRF9160
        
       Author : pantalaimon
       Score  : 36 points
       Date   : 2024-06-11 09:43 UTC (13 hours ago)
        
 (HTM) web link (lenas-fieldnotes.de)
 (TXT) w3m dump (lenas-fieldnotes.de)
        
       | demondemidi wrote:
       | Interesting that you managed to avoid programming the SAU. The
       | default IDAU appears to be sufficient, yes?
        
       | pajko wrote:
       | Related: https://www.lobaro.com/en/using-the-armv8-m-trustzone-
       | with-g...
        
         | transpute wrote:
         | Adds TrustZone, but reduces isolation of LTE radio baseband
         | attack surface?
         | 
         |  _> it breaks with the widespread concept of having one
         | application microprocessor talking over serial line using AT
         | commands with a separate cellular modem. Beside this it uses
         | the latest ARM Cortex-M33 CPU core with new security features
         | targeting especially secure IoT applications. The LTE modem is
         | directly integrated into the SiP and communicating with the
         | application processor using interprocessor communication based
         | on shared memory._
        
       | azubinski wrote:
       | "So of course I opened the big bad search engine and typed Nordic
       | nRF9160 bare-metal example. I quickly learned that, while bare-
       | metal programming Nordic boards is possible"
       | 
       | Google, of course, is very big, angry and bad, but there is no
       | need to search for what is on the manufacturer's website:
        
       | azubinski wrote:
       | But it's just Cortex-M33...
        
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       (page generated 2024-06-11 23:02 UTC)