SHE Secure Hardware Extension - ESCRYPT
SHE Secure Hardware Extension - ESCRYPT
SHE Secure Hardware Extension - ESCRYPT
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<strong>SHE</strong> – Perspective from Specification (6)<br />
� NV-Memory carries<br />
� MASTER_ECU_KEY<br />
• Set up by OEM<br />
(owner)<br />
• Enables change of<br />
other keys<br />
� BOOT_MAC_KEY<br />
• Enables particular<br />
boot request and<br />
thus establishing<br />
secure boot<br />
� BOOT_MAC<br />
• Authentication of<br />
boot code<br />
� KEY_<br />
• Dedicated key storage<br />
for arbitrary functions<br />
• 3 – 10 keys<br />
� PRNG_SEED<br />
• Starting value for pseudo<br />
random number generator<br />
INTERNAL USE ONLY<br />
RAM<br />
ROM<br />
� Irreversible Write Protection of keys in NV-memory<br />
• Any key in NV-memory area shall not be changeable throughout life time of the device once<br />
write-protection was applied by user<br />
21<br />
Crypto-<br />
graphy<br />
Copyright 2012 FUJITSU SEMICONDUCTOR EUROPE GMBH
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