<PackageReference Include="BouncyCastle.Cryptography" Version="2.4.0" />

IAlphabetMapper

public interface IAlphabetMapper
namespace Org.BouncyCastle.Crypto { public interface IAlphabetMapper { int Radix { get; } byte[] ConvertToIndexes(char[] input); char[] ConvertToChars(byte[] input); } }