secp256k1.cr
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q9f
q9f
a native library implementing secp256k1 purely for the crystal language.
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ref: https://crypto.stackexchange.com/questions/45040/can-elliptic-curve-cryptography-encrypt-with-public-key-and-decrypt-with-private
ref: https://tls.mbed.org/kb/cryptography/asn1-key-structures-in-der-and-pem
- It’s easier and more correct to implement secp256k1’s prime field - Then you don’t have to worry about doing the operations modulo the order - You just perform them...
the ec modular inverse is not constant time, which can be very problematic for security (assumption)