add some comment

algo.py

@@ -76,7 +76,7 @@ def exponentiation_rapide(a, exp, n):
 
 def is_square(a):
     """Check if a number is a perfect square, using the Newton methode
-    from https://stackoverflow.com/questions/2489435/check-if-a-number-is-a-perfect-square 
+    from : https://stackoverflow.com/questions/2489435/check-if-a-number-is-a-perfect-square 
         
     Args:
         a (uint): number checked
@@ -85,7 +85,7 @@ def is_square(a):
         bool: true if the number is a perfect square, otherwise flase
     """
     
-    x = a // 2
+    x = a // 2 # start value
     seen = set([x])
     
     while x * x != a:
@@ -127,6 +127,7 @@ def fermat_factorization(n):
 
 def decode_msg(M):
     """Decode a code UTF-8 in characters
+    from : Niklaus Eggenberg
 
     Args:
         M (uint): code UTF-8

main.py

@@ -34,7 +34,7 @@ def main():
     q = a - b
     
     fi = (p - 1) * (q - 1)
-    d = inverse_modulaire(e, fi)
+    d = inverse_modulaire(e, fi) # get private key
 
     # --- decode mu & initialise msg ---
     for i in range(length):
@@ -43,8 +43,10 @@ def main():
     for m in M:
         msg += decode_msg(m)
 
+    # --- output ---
     print("p   :", p, "\nq   :", q, "\nfi  :", fi, "\nd   :", d, "\nmsg :", msg)
     
+    
 if __name__ == "__main__":
     main()
     
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