diff --git a/services/phew/dist/chall.py b/services/phew/dist/chall.py
new file mode 100644
index 0000000..cb18014
--- /dev/null
+++ b/services/phew/dist/chall.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+
+import signal
+from Pailier import *
+from Crypto.Util.number import *
+signal.alarm(10)
+with open("/flag.txt", "rb") as f:
+    flag = f.read()
+flag = bytes_to_long(flag)
+cipher = pailier()
+while True:
+    print("1. encrypt")
+    print("2. bingo")
+    print("3. decrypt")
+    print("4. exit")
+    inp = int(input("> "))
+    if inp==1:
+        print("pt (hex)")
+        inp = input("> ")
+        ct = cipher.encrypt(int(inp,16))
+        print('ct : ','{0:x}'.format(ct))
+    elif inp==2:
+        ct = cipher.encrypt(flag)
+        print('ct : ','{0:x}'.format(ct))
+    elif inp==3:
+        print("ct (hex)")
+        inp = input("> ")
+        pt = cipher.decrypt(int(inp,16))
+        print('pt : ','{0:x}'.format(pt))
+    else:
+        exit()