# System.Net.Security

``` diff
 namespace System.Net.Security {
     public sealed class NegotiateAuthentication : IDisposable {
+        public void ComputeIntegrityCheck(ReadOnlySpan<byte> message, IBufferWriter<byte> signatureWriter);
+        public bool VerifyIntegrityCheck(ReadOnlySpan<byte> message, ReadOnlySpan<byte> signature);
     }
 }
```

