topic Re: LPC55s69 PUF functionality in LPC Microcontrollers

LPC55s69 PUF functionality

satsok_n — Mon, 17 Jan 2022 07:28:33 GMT

Hi,

I am kind of new to the PUF consept. I am using the drivers>PUF example with LPC55S69.I have 3 questions. First, If I use the same activation code after the enroll to start the PUF means that I would have same SRAM cells values. Secondly, how do I get the same intrinsic key to use after I restart the device?. What is the actual meaning of keycode?

Thanks

Re: LPC55s69 PUF functionality

Alice_Yang — Fri, 21 Jan 2022 03:53:07 GMT

Hello satsok_n,

First, If I use the same activation code after the enroll to start the PUF means that I would have same SRAM cells values.

->> Yes.

Secondly, how do I get the same intrinsic key to use after I restart the device?. What is the actual meaning of keycode?

->> About these question, recommend you have a look at the AN12324

https://www.nxp.com.cn/docs/en/application-note/AN12324.pdf

Alice

Re: LPC55s69 PUF functionality

satsok_n — Fri, 21 Jan 2022 13:20:20 GMT

Is there any way to have direct access and read fingerprint? Furthermore, do I have knowledge of Internal functions or am I able to change them?

Re: LPC55s69 PUF functionality

Alice_Yang — Fri, 28 Jan 2022 09:34:51 GMT

Hello satsok_n,

NO.

Alice