crypto_secure_hardwares.txt

### HSM (Hardware Secure Module) vs. TPM (Trusted Platform Module)
http://security.stackexchange.com/questions/88744/what-are-the-differences-between-tpm-and-hsm

CryptoCape_EEPROM.txt

- List all i2c buses on BBB
`i2cdetect -l`
  i2c-0	unknown   	OMAP I2C adapter                	N/A
  i2c-2	unknown   	OMAP I2C adapter                	N/A
- Detect online i2c slaves
`sudo i2cdetect -y -r 2`
  0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
  00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
  10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
  20: -- -- -- -- -- -- -- -- -- 29 -- -- -- -- -- -- 
  30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
  40: -- -- 42 -- -- -- -- -- -- -- -- -- -- -- -- -- 
  50: 50 -- -- -- UU UU UU UU -- -- -- -- -- -- -- -- 
  60: 60 -- -- -- 64 -- -- -- UU -- -- -- -- -- -- --

You may encounter error Error: "Can't use SMBus Quick Write command on this bus" if not using `i2cdetect` with the `-r` option.
[Command Reference]: https://github.com/kelly/node-i2c/issues/27   
For detailed reference of the `i2cdetect` command: https://linux.die.net/man/8/i2cdetect

Dump the content of EEPROM: `sudo cat /sys/bus/i2c/devices/2-0057/eeprom| hexdump -C`
00000000  aa 55 33 ee 41 31 42 42  2d 42 4f 4e 45 2d 43 52  |.U3.A1BB-BONE-CR|
00000010  59 50 54 4f 00 00 00 00  00 00 00 00 00 00 00 00  |YPTO............|
00000020  00 00 00 00 00 00 30 30  41 30 53 70 61 72 6b 46  |......00A0SparkF|
00000030  75 6e 00 00 00 00 00 00  00 00 42 42 2d 42 4f 4e  |un........BB-BON|
00000040  45 2d 43 52 59 50 54 4f  00 00 00 11 32 30 31 34  |E-CRYPTO....2014|
00000050  30 30 30 30 30 30 30 30  00 00 00 00 00 00 00 00  |00000000........|
00000060  00 00 00 00 00 00 00 00  00 00 e0 73 e0 73 00 00  |...........s.s..|
00000070  00 00 00 00 00 00 00 00  00 00 00 00 a0 26 c0 06  |.............&..|
00000080  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000090  00 00 a0 2f 00 00 00 00  00 00 c0 17 00 00 00 00  |.../............|
000000a0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
*
000000e0  00 00 00 00 00 00 00 00  00 00 00 00 01 f4 00 00  |................|
000000f0  00 00 00 00 47 50 47 20  46 69 6e 67 65 72 70 72  |....GPG Fingerpr|
00000100  69 6e 74 3a 20 30 78 42  35 39 31 39 42 31 41 43  |int: 0xB5919B1AC|
00000110  37 31 33 35 39 30 35 46  34 36 36 39 43 38 34 37  |7135905F4669C847|
00000120  42 46 41 35 30 33 31 42  44 32 45 44 45 41 36 0a  |BFA5031BD2EDEA6.|
00000130  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
00008000

CryptoCape_Guides.txt

### ATECC108 doesn't support bitcoin/etherreum secp256k1 ECDSA
- EClet Link: https://cryptotronix.com/products/retired-products/eclet/
- ATECC108 datasheet: http://www.atmel.com/Images/Atmel-8873S-CryptoAuth-ATECC108-Datasheet-Summary.pdf
- Ethereum Hashing and DSA algorithms summarized by ledger: https://blog.ledger.co/innovating-with-bolos-building-an-ethereum-hardware-wallet-216cf5e248a1#.20u7suma8

### Cape Guide
- http://elinux.org/Cryptotronix:CryptoCape
- https://learn.sparkfun.com/tutorials/cryptocape-hookup-guide

### Why secp256k1, not secp256r1/P256
https://bitcointalk.org/index.php?topic=151120.0
http://frass.woodcoin.org/secp256k1-vs-p256/

https://safecurves.cr.yp.to/

Zymkey

Secure Communications Hub (Atmel SAME70)
Atmel SAML21J17A