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I have build multiple embedded devices with TLS1.2/3 + PSK using mbedtls and wolfssl libraries.

My products have been with microcontrollers(ESP32, Silicon labs, etc.) and OpenWRT based Linux products. The devices mainly establish a session and using the session would use MQTT or proprietary protocols to communicate with the cloud.

The connectivity goals of most of these products are:

  1. Connect to cloud and download configurations - mostly
  2. Check and download firmware updates - once a month
  3. Online app based control - rare
  4. Upload diagnostic data - Most frequently used

Lately I have been going through next release tickets for mbedtls and happen to stumble upon a ticket which plans to remove DHE-PSK

I understand the goal of the ticket is to remove Cipher suites with DHE and not ECDHE

As part of my update process in future designs, I would like to educate myself, if TSL with PSK would be a recommend Cipher suites for embedded devices.

Could someone please point out which direction should be considered?

本文标签： tls13Is TLS123PSK recommended for future productsStack Overflow

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