<PackageReference Include="BouncyCastle.Cryptography" Version="2.5.0" />

RecipientEncryptedKey

public Asn1OctetString EncryptedKey { get; }

public static RecipientEncryptedKey GetInstance(object obj)

public static RecipientEncryptedKey GetInstance(Asn1TaggedObject obj, bool isExplicit)

public static RecipientEncryptedKey GetTagged(Asn1TaggedObject taggedObject, bool declaredExplicit)