diff --git a/src/security/blockchain.py b/src/security/blockchain.py
new file mode 100644
index 000000000..f7d61027e
--- /dev/null
+++ b/src/security/blockchain.py
@@ -0,0 +1,49 @@
+import hashlib
+import json
+from time import time
+
+class Block:
+    def __init__(self, index, previous_hash, timestamp, data, hash):
+        self.index = index
+        self.previous_hash = previous_hash
+        self.timestamp = timestamp
+        self.data = data
+        self.hash = hash
+
+class Blockchain:
+    def __init__(self):
+        self.chain = []
+        self.current_data = []
+        self.create_block(previous_hash='1', proof=100)
+
+    def create_block(self, proof, previous_hash):
+        block = Block(len(self.chain) + 1, previous_hash, time(), self.current_data, self.hash(block))
+        self.current_data = []
+        self.chain.append(block)
+        return block
+
+    def add_data(self, sender, recipient, amount):
+        self.current_data.append({
+            'sender': sender,
+            'recipient': recipient,
+            'amount': amount,
+        })
+        return self.last_block.index + 1
+
+    @staticmethod
+    def hash(block):
+        block_string = json.dumps(block.__dict__, sort_keys=True).encode()
+        return hashlib.sha256(block_string).hexdigest()
+
+    @property
+    def last_block(self):
+        return self.chain[-1]
+
+# Example usage
+if __name__ == "__main__":
+    blockchain = Blockchain()
+    blockchain.add_data("Alice", "Bob", 50)
+    blockchain.add_data("Bob", "Charlie", 30)
+
+    last_block = blockchain.create_block(proof=200, previous_hash=blockchain.last_block.hash)
+    print(f"New Block: {last_block.__dict__}")