diff --git a/.env.example b/.env.example
index ff3b9f6..2da2b00 100644
--- a/.env.example
+++ b/.env.example
@@ -38,3 +38,4 @@ UVICORN_PORT = 8000
 # WEBHOOK_SECRET = "something-very-very-secret"
 # VITE_BASE_API="https://example.com/api/"
 # JWT_ACCESS_TOKEN_EXPIRE_MINUTES = 1440
+# AUTH_GENERATION_ALGORITHM=xxh128
diff --git a/app/config/env.py b/app/config/env.py
index c860819..a1aa701 100755
--- a/app/config/env.py
+++ b/app/config/env.py
@@ -1,5 +1,6 @@
 from decouple import config
 from dotenv import load_dotenv
+from enum import Enum
 
 load_dotenv()
 
@@ -65,6 +66,18 @@ CLASH_SUBSCRIPTION_TEMPLATE = config(
 WEBHOOK_ADDRESS = config("WEBHOOK_ADDRESS", default=None)
 WEBHOOK_SECRET = config("WEBHOOK_SECRET", default=None)
 
+
+class AuthAlgorithm(Enum):
+    PLAIN = "plain"
+    XXH128 = "xxh128"
+
+
+AUTH_GENERATION_ALGORITHM = config(
+    "AUTH_GENERATION_ALGORITHM",
+    cast=AuthAlgorithm,
+    default=AuthAlgorithm.XXH128,
+)
+
 # recurrent notifications
 
 # timeout between each retry of sending a notification in seconds
diff --git a/app/utils/keygen.py b/app/utils/keygen.py
index c8ed478..dde1d98 100644
--- a/app/utils/keygen.py
+++ b/app/utils/keygen.py
@@ -1,10 +1,17 @@
 import xxhash
 import uuid
+from app.config.env import AuthAlgorithm, AUTH_GENERATION_ALGORITHM
 
 
 def gen_uuid(key: str) -> str:
-    return str(uuid.UUID(bytes=xxhash.xxh128(key.encode()).digest()))
+    if AUTH_GENERATION_ALGORITHM == AuthAlgorithm.PLAIN:
+        return str(uuid.UUID(key))
+    else:
+        return str(uuid.UUID(bytes=xxhash.xxh128(key.encode()).digest()))
 
 
 def gen_password(key: str) -> str:
-    return xxhash.xxh128(key.encode()).hexdigest()
+    if AUTH_GENERATION_ALGORITHM == AuthAlgorithm.PLAIN:
+        return key
+    else:
+        return xxhash.xxh128(key.encode()).hexdigest()