Forums

Hardware encryption IC.

Started by casperPro 5 years ago5 replieslatest reply 5 years ago762 views

Hi all, 

         Am currently doing some micro controller communication using PICs and investigating their software encryption libraries. Just wanted to know if there are any integrated circuits that are dedicated for encryption. This will help me speed things up, although clearly this exposes me to the risk of any one with a physical access to my pcb can actually just read data off. 

Still it would be good to know what encryption IC are out there like the one below,

https://datasheets.maximintegrated.com/en/ds/MAX36...


Thanks.


[ - ]
Reply by jms_nhMarch 17, 2017

Some of the higher-end PIC devices have a Hardware Crypto Engine.

[ - ]
Reply by Tim WescottMarch 17, 2017

Google is your friend: https://en.wikipedia.org/wiki/AES_instruction_set#...

Dunno if there are many microcontrollers out there with it, but I wouldn't be surprised.

[ - ]
Reply by wyzarddocMarch 17, 2017

You might consider one of the fpga chips for a truly unbreakable encription. You would just wire from your micro controller in parallel to the fpga then out to the world

[ - ]
Reply by AlexmouseMarch 18, 2017

Atmel have tiny encryption parts such as the ATECC508A, ST & Infineon also.

[ - ]
Reply by casperProMarch 20, 2017

Thanks for the valuable suggestions. As far as I understand there are two options.


A. Do the encryption in the microcontroller using either code only or code with    specialized units available inside the microcontroller.

   PRO: This is more secure since data is encrypted before leaving the                   microcontroller.

   CON: Encryption can slow the processing of other functions. Also changing a           microcontroller on an existing project can be difficult.


B. Do encryption outside the microcontroller using either a dedicated IC or        FPGA.

PRO: This is faster.

CON: Unencrypted data must leave microcontroller and go to the dedicated            encryption IC/FPGA. This would allow any hacker with logic analyser

     and access to the board to read unencrypted data. 

 Is there any way the data can be sent to the dedicated encryption unit in a safe way? I am thinking of a hybrid strategy where a weak encryption is done on the microcontroller and then this weakly encrypted data is sent to the dedicated encryption device.

Any suggestions in this context would be good!


Thanks.