Atmel Sam Cryptography with CryptoAuth-Xpro-B
Revision as of 11:29, 23 June 2019 by Nmuehlberger (talk | contribs)
Summary
This documentation describes the usage of security features for microcontrollers especially for the Atmel Sam R21 with the expansion board Atcryptoauth Xpro B.
Requirements
Description
The Cryptoauth expansion board contains four chips which gets connected via I2C Chips:
- ATSHA204A (SHA256)
- ATECC508A (Ellipticcurve P256, SHA256)
- ATECC608A (Ellipticcurve P256, SHA256, AES-GCM)
- ATAES132A (AES128)
Implementation for ATECCx08A and ATSHA204A
The implementation for ATECCx08A and ATSHA204A is based on the Cryptoauthlib.For ease of use of the ASF USART a custom abstraction layer got implemented.
The example program Implements:
- Showing the serial numbers of the chips
- Hashing a message
- Showing locked zones
- Locking zones
- Generate a random number (only works with locked configuration Zone)
- Generate a keypair (only works with locked configuration Zone)
Usage:
- Connect your microcontroller to the EDGB USB port and upload the software
- Open a terminal Program (Putty, TeraTerm)
- Terminal program configuration:
Baud rate 115200 Data bits 8 Stop bits 1 Parity none
- Press the restart button in the controller
- The implementation has an text menu which allows you to navigate by numbers
Security Features
Cryptographic algorithms
User Guides
Used Hardware
Courses
Wahlfachprojekt1 2019
References
Implementation:
- https://www.insidegadgets.com/2017/04/21/alarm-system-v3-part-3-using-the-atmel-cryptoauthentication-atsha204a/
- https://www.youtube.com/watch?v=TAOVKcN-pwY
- https://microchiptech.github.io/cryptoauthlib/html/index.html
Cryptographic algorithms:
- https://en.wikipedia.org/wiki/SHA-2
- http://www.iwar.org.uk/comsec/resources/cipher/sha256-384-512.pdf
- https://www.geeksforgeeks.org/implementation-diffie-hellman-algorithm/
- https://www.korelstar.de/informatik/aes.html
- https://en.wikipedia.org/wiki/Advanced_Encryption_Standard#Description_of_the_ciphers