Issue deserializing encrypted data using BinaryFormatter

Question

Here is my code:

    public static void Save(T toSerialize, string fileSpec) {
        BinaryFormatter formatter = new BinaryFormatter();
        DESCry         


        

Answer 1

One small typo: your Load method should use des.CreateDecryptor, like this:

public static T Load<T>(string fileSpec)
{
    BinaryFormatter formatter = new BinaryFormatter();
    DESCryptoServiceProvider des = new DESCryptoServiceProvider();

    using (FileStream stream = File.OpenRead(fileSpec))
    {
        using (CryptoStream cryptoStream = 
               new CryptoStream(stream, des.CreateDecryptor(key, iv),
                                CryptoStreamMode.Read))
        {
            return (T)formatter.Deserialize(cryptoStream);
        }
    }
}