diff --git a/src/N_m3u8DL-RE.Parser/Mp4/MSSMoovProcessor.cs b/src/N_m3u8DL-RE.Parser/Mp4/MSSMoovProcessor.cs
index 7e16eb8..3a1a13f 100644
--- a/src/N_m3u8DL-RE.Parser/Mp4/MSSMoovProcessor.cs
+++ b/src/N_m3u8DL-RE.Parser/Mp4/MSSMoovProcessor.cs
@@ -36,8 +36,8 @@ public partial class MSSMoovProcessor
     private bool IsProtection;
     private string ProtectionSystemId;
     private string ProtectionData;
-    private string? ProtecitonKID;
-    private string? ProtecitonKID_PR;
+    private string? ProtectionKID;
+    private string? ProtectionKID_PR;
     private byte[] UnityMatrix
     {
         get
@@ -166,13 +166,13 @@ public partial class MSSMoovProcessor
             var text = Encoding.ASCII.GetString(bytes);
             var kidBytes = Convert.FromBase64String(KIDRegex().Match(text).Groups[1].Value);
             // save kid for playready
-            this.ProtecitonKID_PR = HexUtil.BytesToHex(kidBytes);
+            this.ProtectionKID_PR = HexUtil.BytesToHex(kidBytes);
             // fix byte order
             var reverse1 = new[] { kidBytes[3], kidBytes[2], kidBytes[1], kidBytes[0] };
             var reverse2 = new[] { kidBytes[5], kidBytes[4], kidBytes[7], kidBytes[6] };
             Array.Copy(reverse1, 0, kidBytes, 0, reverse1.Length);
             Array.Copy(reverse2, 0, kidBytes, 4, reverse1.Length);
-            this.ProtecitonKID = HexUtil.BytesToHex(kidBytes);
+            this.ProtectionKID = HexUtil.BytesToHex(kidBytes);
         }
         // widevine
         else if (ProtectionSystemId.ToUpper() == "EDEF8BA9-79D6-4ACE-A3C8-27DCD51D21ED")
@@ -225,7 +225,7 @@ public partial class MSSMoovProcessor
         tencPayload.AddRange([0, 0]);
         tencPayload.Add(0x1); // default_IsProtected
         tencPayload.Add(0x8); // default_Per_Sample_IV_size
-        tencPayload.AddRange(HexUtil.HexToBytes(ProtecitonKID)); // default_KID
+        tencPayload.AddRange(HexUtil.HexToBytes(ProtectionKID)); // default_KID
         // tencPayload.Add(0x8);// default_constant_IV_size
         // tencPayload.AddRange(new byte[8]);// default_constant_IV
         var tencBox = FullBox("tenc", 0, 0, tencPayload.ToArray());
@@ -753,10 +753,10 @@ public partial class MSSMoovProcessor
         using var _stream = new MemoryStream();
         using var _writer = new BinaryWriter2(_stream);
         var sysIdData = HexUtil.HexToBytes("edef8ba9-79d6-4ace-a3c8-27dcd51d21ed".Replace("-", ""));
-        // var kid = HexUtil.HexToBytes(ProtecitonKID);
+        // var kid = HexUtil.HexToBytes(ProtectionKID);
 
         _writer.Write(sysIdData);  // SystemID 16 bytes
-        var psshData = HexUtil.HexToBytes($"08011210{ProtecitonKID}1A046E647265220400000000");
+        var psshData = HexUtil.HexToBytes($"08011210{ProtectionKID}1A046E647265220400000000");
         _writer.WriteUInt(psshData.Length); // Size of Data 4 bytes
         _writer.Write(psshData); // Data
         var psshBox = FullBox("pssh", 0, 0, _stream.ToArray());