var keys = await RSA.generate(2048);
_ourPrivateKey = keys.privateKey;
_ourPublicKey = keys.publicKey;
// Application 1
var enc = await RSA.encryptOAEP(message, "yes", Hash.SHA256, _ourPublicKey);
// at this point the message has arrived on Application 2
var dec = await RSA.decryptOAEP(message, "yes", Hash.SHA256, _ourPrivateKey);