Elliptical Curve Cryptography on ST

I think I understand a good amount of the theory behind elliptic curve cryptography, however, I am slightly unclear on how exactly a message is encrypted and then how is it decrypted. I am using the ATECC608A module with i2c interfacing. So my questions are

  • How are messages encrypted and decrypted?
  • How are the public and private keys generated?

If there is any example code for it, it would be of great help if you share it.

I need to know step by step instructions to program it.

Thanks for the help

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