Crypto: Create an ECDH key pair and calculate shared secret
A minimal example how to generate a ECDH key pair and calculate the shared secret
Openssl
Crypto: Derive key using KDF functions
A minimal example how to derive a new secret key from a shared key using KDF functions
Crypto: Encrypt and decrypt with AES-128 CTR
A minimal example how to encrypt and decrypt data with AES-128 in CTR mode