diff --git a/memory/keychain.py b/memory/keychain.py
index cb580dc..eb5acc0 100644
--- a/memory/keychain.py
+++ b/memory/keychain.py
@@ -1,8 +1,10 @@
 """Keychain: save key to a file, then keys.set("name", file="path"); keys.name.use() to retrieve (use but no print)."""
-import json, os, hashlib, pathlib
+import json, os, hashlib, pathlib, getpass
 
 _PATH = pathlib.Path.home() / "ga_keychain.enc"
-_MASK = hashlib.sha256(f"{os.getlogin()}@ga_keychain".encode()).digest()
+try: _user = os.getlogin()
+except OSError: _user = getpass.getuser()
+_MASK = hashlib.sha256(f"{_user}@ga_keychain".encode()).digest()
 
 def _xor(data: bytes) -> bytes:
     return bytes(b ^ _MASK[i % len(_MASK)] for i, b in enumerate(data))