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SHE (Secure Hardware Extension) Key Update

Last updated: 2020-05-12

Crypto-SHE Key Update

The Secure Hardware Extension (SHE) is an on-chip extension, intended to move the control over cryptographic operations and crypto keys meterial from software to hardware domain, where they are protected from software attacks. The SHE Key Update protocol therfore specifies a way for secure and encrypted key exchange for this modules, but is also supported by MICROSAR software based Crypto drivers.

This document describes, how to persist SHE keys in MICROSAR Crypto solution and explains the functional flow of using the SHE Key Update protocol. It can be benefitial to persist an initial key, to change an existing SHE key, or to debug and test the Crypto solution.

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