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STSAFE-A110 bảng dữ liệu(PDF) 16 Page - STMicroelectronics

tên linh kiện STSAFE-A110
Giải thích chi tiết về linh kiện  Authentication, state-of-the-art security for peripherals and IoT devices
PDF  36 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STSAFE-A110 bảng dữ liệu(HTML) 16 Page - STMicroelectronics

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Asymmetric cryptography use cases
STSAFE-A110
16/36
DS13039 Rev 1
2.4
Public key signature verification
The STSAFE-A110 supports signature verification. It can be used to allow an IoT device to
verify the authenticity of a remote server or of the local host firmware used at secure boot or
loaded for firmware update.
Command flow (see Figure 8)
1.
The local host computes a hash over the message.
2.
The local host needs the Public Key that corresponds to the private key that was used
to generate the signature. This key could be stored in the STSAFE-A110 data partition,
so the local host could use the Read command to get it.
3.
The local host needs the ID of the curve used to sign the message.
4.
The local host sends the STSAFE-A110 the Verify Signature[Hash, Signature, Public
Key, Curve ID] command
5.
The STSAFE-A110 verifies the signature and replies with Valid / Invalid.
Figure 8. Public Key Signature Verification command flow
2.5
Applicative data storage
The device comes with 6 Kbytes of EEPROM configurable by the customer for its
application data storage. These 6 Kbytes can be partitioned with the appropriate access
rights.



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