update

app/security/security.py

@@ -15,4 +15,10 @@ async def browser_local_cryptography_strength(request: Request):
 async def pigeonhole_principle_simulation(request: Request):
     return templates.TemplateResponse(
         request=request, name="pigeonhole.html"
+    )
+
+@security_router.get("/noise-letter")
+async def noise_letter_visualization(request: Request):
+    return templates.TemplateResponse(
+        request=request, name="noise_letter.html"
     )