Hi,
Im building system consist of few microcontrollers (sensors/keyboards/leds) and server with windows c# app.

All these devices communicates through TCP sockets for now. But client want to secure this system for prevent rogue devices sending communicates to server and making "nois" in system.

Im wondering what simple mechanism will be the best for this case? I only need auth device but sending messages can be visible (transmitted data contains parameters from keyboard or sensors).

Please give me some suggestions for that

PS Filtering on network devices isnt possible.

K.

 

Can you use SSL?

What do you mean by "I only need auth device"? What is an "auth device"?

 

Can you use SSL?

What do you mean by "I only need auth device"? What is an "auth device"?

Hi, than you for replay.

I need only authorize devices using ... token, password, cert, MAC, combination of some of these.... preparing some tunnel or something like this.

Normaly securing connection meaning integrity of data, authorization of communication sites and confidentiality... I need only auth.


this solution must be scalable ... changing devices ... few by day

 

I would use something similar to MODBUS-TCP TLS security if you want something that's reasonably secure.

https://modbus.org/docs/MB-TCP-Security-v21_2018-07-24.pdf