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 # UltimateKEYS Keyboard Layout (Windows/Linux)
 
-International US QWERTY layout with AltGr (Right Alt) dead keys via AutoHotkey script (Win), MSKLC source (Win, obsolete) and XKB integration (Linux, experimental).
+International US QWERTY layout with AltGr (Right Alt) dead keys via AutoHotkey script (Win), MSKLC source (Win, obsolete) and XKB integration (Linux, experimental). Derived from EurKEY (by Steffen Brüntjen).
 
 [![GitHub Release](https://img.shields.io/github/release/pieter-degroote/UltimateKEYS.svg)](https://github.com/pieter-degroote/UltimateKEYS/releases)
 
+## Important - Security Warning :
+
+**=> Win/Linux :  Only use "BASIC LATIN" characters (codes 32 to 126) for the Windows, Microsoft Live and Linux passwords !**
+Otherwise, it might be impossible to type any Unicode character higher than "Basic Latin" at the login screen/prompt (due to a different keyboard configuration) ! -> ACCOUNT LOCKOUT
+
+**=> Win/Linux :  ALWAYS make your system passwords VISIBLE during modification !**
+
 ## Website :  https://pieter-degroote.github.io/UltimateKEYS/
 
 ## Releases :  https://github.com/pieter-degroote/UltimateKEYS/releases