Which asymmetric algorithm will be best only for key exchange to set up communication using symmetric cryptographic algorithm. Comparison should be in term of speed, key length and their hardware implementation on FPGA?

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    $\begingroup$ What's wrong with Curve25519? By now there should be plenty of implementations of that DH key agreement algorithm as well. It's not quantum-safe of course, but otherwise it is true and tested in e.g. TLS 1.3. $\endgroup$
    – Maarten Bodewes
    Sep 4, 2021 at 15:42


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