diff --git a/list_comparing.py b/list_comparing.py
deleted file mode 100644
index 0146253..0000000
--- a/list_comparing.py
+++ /dev/null
@@ -1,26 +0,0 @@
-list_compare0 = lambda A,B: all(A[n] == B[n] for n in range(0, len(A)))
-
-def list_compare1(A,B):
-    """
-    Compare elementwise two lists.
-    Args:
-        Lists: A,B.
-    Returns:
-        Boolean
-    Comment:
-        Still faster than: return all(A[n] == B[n] for n in range(0, len(A)))
-    """
-    for n in range(0,len(A)):
-        if A[n] != B[n]:
-            return False
-    return True
-
-
-def list_compare2(A,B):
-    tmp = 0
-    n = 0
-    lA=len(A)
-    while tmp == 0 and n < lA:
-        tmp += abs(A[n]-B[n])
-        n += 1
-    return n == lA
diff --git a/passbolt_api_hibp_test.py b/passbolt_api_hibp_test.py
index f85566e..5e10b31 100644
--- a/passbolt_api_hibp_test.py
+++ b/passbolt_api_hibp_test.py
@@ -5,8 +5,10 @@
 import json
 import pwnedpasswords
 import sys
+from os.path import exists
 from tqdm import tqdm
 import urllib3
+from lib.pickling import *
 
 urllib3.disable_warnings()
 passbolt = passboltapi.PassboltAPI(config_path="config.ini", new_keys=True)
@@ -20,8 +22,9 @@ def load_dict(passbolt):
   sys.stderr.write("Gathering resources from passbolt...\n")
   D = {}
   for r in tqdm(passbolt.get(url="/resources.json?api-version=v2")['body']):
-    password = passbolt.get_password(r['id'])
-    if password != None:
+    if ((password := passbolt.get_password(r['id'])) != None):
+    #password = passbolt.get_password(r['id']) 
+    #if password != None:
       t = (r['id'], r['name'],r['username'],r['uri'],r['description'])
       if password not in D:
         D[password] = [t]
@@ -37,14 +40,22 @@ def proc_dict(passbolt, D):
   output: broken_plain_password_list
   """
   sys.stderr.write("Checking passwords hashes against HIBP...\n")
-  broken=[]
-  for password in tqdm(D):
-    rating = pwnedpasswords.check(password, plain_text=True)
-    if rating > 0:
-      broken.append(password)
-  return broken
+  return [password for password in tqdm(D) if pwnedpasswords.check(password, plain_text=True) > 0]
 
 
+def proc_pickle(D, key=None):
+  """
+  loads a pickle and a dictinary and returns a list of keys that are not in the pickle
+  input dictionary
+  output: broken_plain_password_list
+  """
+  filename = ".%s.pkl" % sys.argv[0]
+  pkldata = []
+  if exists(filename): pkldata = decompress_pickle(filename,key=key)
+  newdata = [password for password in D if password not in pkldata]
+  compress_pickle(filename, pkldata + newdata, key=key)
+  return newdata
+
 def display_broken(broken):
   """
   Display info in the dictionary using elements of broken list as key.
@@ -52,15 +63,11 @@ def display_broken(broken):
   """
   sys.stderr.write("Results:\n")
   for password in broken:
-    sys.stderr.write("-" * 60 + "\n")
     sys.stdout.write("-" * 60 + "\n")
-    sys.stderr.write("broken password: %s\n" % password)
     sys.stdout.write("broken password: %s\n" % password)
     for t in D[password]:
       msg = "id:%s, name:%s, username:%s, uri: %s, description: %s\n" % t
-      sys.stderr.write(msg)
       sys.stdout.write(msg)
-    sys.stderr.flush()
     sys.stdout.flush()
   sys.stderr.write("Total broken: %d\n" % len(broken))
   sys.stderr.flush()
@@ -68,5 +75,6 @@ def display_broken(broken):
 
 if __name__ == "__main__":
   D = load_dict(passbolt)
-  broken = proc_dict(passbolt, D)
+  D1 = proc_pickle(D,key=passbolt.config["PASSBOLT"]["PASSPHRASE"])
+  broken = proc_dict(passbolt, D1)
   display_broken(broken)