<PackageReference Include="BouncyCastle.Cryptography" Version="2.2.0" />

KeyTransRecipientInfoGenerator

protected virtual AlgorithmIdentifier AlgorithmDetails { get; }

public KeyTransRecipientInfoGenerator(byte[] subjectKeyID, IKeyWrapper keyWrapper)

public RecipientInfo Generate(KeyParameter contentEncryptionKey, SecureRandom random)

protected virtual byte[] GenerateWrappedKey(KeyParameter contentEncryptionKey)