压缩文件加密问题？

Question

下载一个SharpZipLib.dllZipOutputStream s = new ZipOutputStream("");
            
            using (ZipInputStream s = new ZipInputStream(File.OpenRead("d:\\WorkSpace.zip")))
            {                ZipEntry theEntry;
                while ((theEntry = s.GetNextEntry()) != null)
                {                    string directoryName = "d:\\aa\\" + Path.GetDirectoryName(theEntry.Name);
                    string fileName = Path.GetFileName(theEntry.Name);                    // create directory
                    if (directoryName.Length > 8)
                    {
                        Directory.CreateDirectory(directoryName);
                    }
                    Debug.WriteLine("Filename" + fileName);
                    if (fileName != String.Empty)
                    {
                        using (FileStream streamWriter = File.Create(directoryName +"\\"+ fileName))
                        {
                            Debug.WriteLine("streamWriter" + streamWriter.Name);
                            int size = 2048;
                            byte[] data = new byte[2048];
                            while (true)
                            {
                                size = s.Read(data, 0, data.Length);
                                if (size > 0)
                                {
                                    streamWriter.Write(data, 0, size);
                                }
                                else
                                {
                                    break;
                                }
                            }
                        }
                    }
                }
            }

Answer 1

这个我知道，有没有Windows本身提供的标准函数库来完成加密的？