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中文社区论区
请教:1、为什么TEE都要设计独立ROM作为信任根?2、假设将TEE安全启动都放在TEE和REE共享的SOC内的FLASH中,而后再在安全启动过程中将TEE使用的FLASH区域设置成TEE专用区,并作为信任根,这样是否与“将TEE安全启动放在TEE独立的ROM中”的安全等级是一样的?谢谢。
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请教:1、为什么TEE都要设计独立ROM作为信任根?2、假设将TEE安全启动都放在TEE和REE共享的SOC内的FLASH中,而后再在安全启动过程中将TEE使用的FLASH区域设置成TEE专用区,并作为信任根,这样是否与“将TEE安全启动放在TEE独立的ROM中”的安全等级是一样的?谢谢。
MTS
over 6 years ago
同上
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jett
over 6 years ago
in reply to
MTS
+2
verified
谢谢share更多应用场景信息。架构手册中提到的以 OTP/Efuse的形式存放于SOC内部,是出厂设置一次,以后以只读方式访问,攻击难度更高,安全性也更高。具体产品设计可以根据具体产品安全性需求不同而不同,如果只有TEE可以访问flash安全区域,normal world是不能访问的,那么可以达到一般TEE保护的级别了。
MTS
over 6 years ago
in reply to
Song Bin 宋斌
+1
好的。在社区学到很多知识,非常感谢。
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Song Bin 宋斌
over 6 years ago
in reply to
MTS
不客气,欢迎提问
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Song Bin 宋斌
over 6 years ago
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MTS
不客气,欢迎提问
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