public string EncriptItemForShare(Share share, string receiverPublicKey)
{
string payloadPlain = share.GetShareJson();
string encriptionKey = String.Empty;
AESKeySet keySet = null;
string payload = pbData.EcryptAndSignWithAES(payloadPlain, out keySet);//.EncriptWithAES(payloadPlain, out encriptionKey);
encriptionKey = pbData.EncriptWithRSA(receiverPublicKey, keySet.KeysToString());
return(JsonConvert.SerializeObject(new { key = encriptionKey, payload = payload }, Formatting.None, new JsonSerializerSettings()
{
NullValueHandling = NullValueHandling.Ignore
}));
}