JAJSLN6C May 2012 – May 2021 BQ34Z100
PRODUCTION DATA
The BQ34Z100 can act as a SHA-1/HMAC authentication slave by using its internal engine. Sending a 160-bit SHA-1 challenge message to the device will cause the IC to return a 160-bit digest, based upon the challenge message and hidden plain-text authentication keys. When this digest matches an identical one generated by a host or dedicated authentication master (operating on the same challenge message and using the same plain text keys), the authentication process is successful.
The device contains a default plain-text authentication key of 0x0123456789ABCDEFFEDCBA987654321. If using the device's internal authentication engine, the default key can be used for development purposes, but should be changed to a secret key and the part immediately sealed before putting a pack into operation.