rsdio tipped us to some interesting parts and application notes: MAXQ1004 a 1-Wire and SPI Authentication Microcontroller.
Secure Your Application and Save Your Battery with an Authentication Micro That Consumes Only 300nA in Stop Mode
- Protects your investment with government-grade AES encryption
- Easily add authentication to your application using one of several interfaces (1-Wire, SPI™, GPIO)
- Minimal impact on battery-powered applications
- In-application programmable flash offers flexibility of communication protocol
Thanks rsdio!
Hang on – is this what I think it is?
Yup.
“This type of authentication is appropriate for use in protecting revenue streams (battery pack authentication), validating peripherals (video game controllers)…”
I.E. it’s for preventing third party accessory competition. Yuck.
It’s good to know your enemy ;)