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I am starting to use OpenThread in a project to communicate using CoAP protocol. I wanted to know if OpenThread supports OSCORE if I do not want to use DTLS for security.

rptech
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According OpenThread DTLS alternatives at least in 2019 there was no alternative. I'm not sure, why you search for one.

Achim Kraus
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  • DTLS is transport layer security which may create overheads of handshaking during communication. I am looking for Application Layer Security for efficiency to be exact. There is OSCORE mechanism for CoAP, however I am not sure if OpenThread already have a support for this or how can somebody implement on top of OpenThread CoAP APIs. – rptech Jun 23 '20 at 12:17
  • The required handshakes depends much on your network environment. Using DTLS 1.2 Connection ID lowers significantly the number of handshakes caused by address changes (but I guess, open-thread doesn't use it :-) ). With that, the number of the required handshakes should be similar to the number of "OSCORE key rederivation". – Achim Kraus Jun 23 '20 at 14:28