diff --git a/doc/README.md b/doc/README.md
index cefe87d..497e2e1 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -101,3 +101,17 @@ Option 3: Kernel module {#kernel-module}
 
 * Only works with Linux system calls
 * Also works with statically linked executables
+* Only possible with some "hacks" inside the kernel module (to access the Syscall Table)
+* [litux.nl?](https://litux.nl/mirror/networksecuritytools/0596007949/networkst-CHP-7-SECT-2.html)
+
+
+Option 4: Emulating {#emulating}
+--------------------------------
+
+* Valgrind, GDB
+
+
+Option 5: Modifying the kernel {#kernel}
+----------------------------------------
+
+* Add a special Syscall to intercept/modify other Syscalls