diff --git a/.env b/.env
index 841e9cc..e0c10b9 100644
--- a/.env
+++ b/.env
@@ -1,32 +1 @@
-# Servidor
-SERVER_HOST=0.0.0.0
-SERVER_PORT=5503
-
-# Base de datos
-DATABASE_URL=sqlite:///./aidsmonitoring.db
-
-# AIS Source: SIMULATOR | UDP | TCP | SERIAL
-AIS_SOURCE=SIMULATOR
-
-# Si AIS_SOURCE=UDP
-AIS_UDP_HOST=127.0.0.1
-AIS_UDP_PORT=10110
-
-# Si AIS_SOURCE=SERIAL (RTL-SDR mañana)
-AIS_SERIAL_PORT=COM3
-AIS_SERIAL_BAUD=38400
-
-# Mapa - centro inicial (Miami)
-MAP_CENTER_LAT=25.7743
-MAP_CENTER_LON=-80.1937
-MAP_ZOOM=11
-
-# GPS receptor serial — dejar vacío para auto-detección, poner COM8 si es fijo
-GPS_PORT=
-# GPS_BAUD=9600   # dejar comentado = prueba 9600, 4800, 115200, 38400 automáticamente
-
-# Alertas
-PROXIMITY_ALERT_METERS=500
-PROJECTION_MINUTES=10
-PRE_BUFFER_MINUTES=5
-GPS_BAUD=9600
+SECRET_KEY=900fc274236e8254115faf2815d6a775c1661e2d9b929a35a0ebed4147dd31f1
diff --git a/backend/routers/auth.py b/backend/routers/auth.py
index 3739500..fbcc182 100644
--- a/backend/routers/auth.py
+++ b/backend/routers/auth.py
@@ -12,7 +12,9 @@ import os
 from database import get_db, SessionLocal
 from models.user import User, Role
 
-SECRET_KEY  = os.getenv("SECRET_KEY", "aidsmonitoring-secret-2026-change-in-prod")
+SECRET_KEY  = os.getenv("SECRET_KEY")
+if not SECRET_KEY:
+    raise RuntimeError("SECRET_KEY no configurado — crea backend/.env con SECRET_KEY=<valor>")
 ALGORITHM   = "HS256"
 TOKEN_HOURS = 8