public static int GetCipherBlockSize(SymmetricKeyAlgorithm skAlgorithm)
{
if (skAlgorithm.Equals(SymmetricKeyAlgorithm.IDEA)) return Constants.IDEA_CIPHER_BLOCK_SIZE;
//else if (skAlgorithm.Equals(PublicKeyAlgorithm.ElGamalEncryptOnly)) return Constants.ELGAMAL_ENCRYPT_ONLY_PUBLIC_KEY_MPI_COUNT;
//else if (skAlgorithm.Equals(PublicKeyAlgorithm.RSA)) return Constants.RSA_PUBLIC_KEY_MPI_COUNT;
else return 0;
}