diff --git a/break_rsa.py b/break_rsa.py
new file mode 100644
index 0000000..b314b1b
--- /dev/null
+++ b/break_rsa.py
@@ -0,0 +1,37 @@
+import sympy
+import time
+from Crypto.PublicKey import RSA
+from Crypto.Util.number import inverse
+from math import gcd
+
+
+file_public_key = input("Entrer le chemin de la clé publique: ")
+
+with open(file_public_key, "r") as f:
+    key = RSA.importKey(f.read())
+
+n = ... # trouver le n de la clé
+e = ... # trouver le e de la clé
+
+chrono = time.time()
+
+factors = sympy.factorint(n)
+print("Found factors in", time.time() - chrono, "seconds")
+
+p, q = list(factors.keys())
+
+print(f"p={p}, q={q}")
+
+phi = ... # Trouver phi
+
+d = ... # trouver d
+
+
+private_key = RSA.construct((n, e, d, p, q))
+private_key_pem = private_key.export_key()
+
+private_key_file = "private_key.pem"
+with open(private_key_file, "wb") as f:
+    f.write(private_key_pem)
+
+print(f"Clé privée générée et sauvegardée dans '{private_key_file}'")
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