diff --git a/source/Card.py b/source/Card.py
new file mode 100644
index 0000000..6b981bf
--- /dev/null
+++ b/source/Card.py
@@ -0,0 +1,2 @@
+class Card:
+    ...
diff --git a/source/Certificate.py b/source/Certificate.py
new file mode 100644
index 0000000..703fac3
--- /dev/null
+++ b/source/Certificate.py
@@ -0,0 +1,6 @@
+class Certificate:
+    """
+    A certificate.
+    Wrapper around cryptography.x509.Certificate.
+    """
+
diff --git a/source/Machine.py b/source/Machine.py
new file mode 100644
index 0000000..7f87505
--- /dev/null
+++ b/source/Machine.py
@@ -0,0 +1,62 @@
+class Machine:
+    """
+
+    """
+
+    def __init__(self):
+        # First DB: list of people authorized to vote on this machine.
+        # Public (que name et procuration pas empreinte) ?
+        self.emerging_list = [
+            {
+                "name": "Bob",
+                "personne": (pub_key_bob, Enc(empreinte_bob)),
+                "procuration": "vide",
+            },
+            {
+                "name": "Alice",
+                "personne": (pub_key_alice, Enc(empreinte_alice)),
+                "procuration": (pub_key_Eve, Enc(empreinte_eve)), # Eve peut voter pour Alice.
+            }
+        ]
+
+        # Second DB: list of people who voted.
+        # - public
+        self.signing_list = [
+            ("pub_key_Alice", "pub_key_Eve", "date", signature("message")),
+            ("pub_key_Bob", "pub_key_Bob", "date", signature("message")),
+        ]
+
+        # Third DB: votes (shuffle when vote is inserted).
+        # - private
+        self._vote_list = ["A", "B", "C"]
+
+    def authenticate(self):
+        pass
+
+    def vote(self, card: Card) -> bool:
+        if not authenticate(card):
+            print("la carte peut pas voter dans cette machine")
+            return False
+
+        if card_in_siging_list(card):
+            print("déjà vôté")
+            return False
+
+        vote = get_vote()
+        generate_signature(vote, card)
+        add_vote_to_urn(vote)
+        print("Vote comptabilisé!")
+        return True
+
+    def print_signing_list(self) -> None:
+        ...
+
+    def print_emerging_list(self) -> None:
+        ...
+
+    def cloture_du_vote(self) -> tuple[list[vote], signature]:
+        ...
+
+
+machine = Machine()
+machine.emerging_list
\ No newline at end of file