diff --git a/.gitignore b/.gitignore
index 06c5e4aa9..014f76683 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
-*.kate-swp
-
+updates_key.pem
diff --git a/update/LATEST_VERSION b/update/LATEST_VERSION
new file mode 100644
index 000000000..ffd053688
--- /dev/null
+++ b/update/LATEST_VERSION
@@ -0,0 +1 @@
+2012.12.27
\ No newline at end of file
diff --git a/update/sign_versions.py b/update/sign_versions.py
new file mode 100755
index 000000000..072cd1393
--- /dev/null
+++ b/update/sign_versions.py
@@ -0,0 +1,27 @@
+#! /usr/bin/env python3
+
+import rsa
+import json
+from binascii import hexlify
+
+# TODO path discovery
+versions_info = json.load(open('versions.json'))
+if 'signature' in versions_info:
+	del versions_info['signature']
+
+
+print('Enter the PKCS1 private key, followed by a blank line:')
+privkey = ''
+while True:
+	try:
+		line = input()
+	except EOFError:
+		break
+	if line == '':
+		break
+	privkey += line + '\n'
+privkey = bytes(privkey, 'ascii')
+privkey = rsa.PrivateKey.load_pkcs1(privkey)
+
+signature = hexlify(rsa.pkcs1.sign(json.dumps(versions_info, sort_keys=True).encode('utf-8'), privkey, 'SHA-256'))
+print('signature: ' + signature.decode())
\ No newline at end of file
diff --git a/update/versions.json b/update/versions.json
new file mode 100644
index 000000000..2b1ea895f
--- /dev/null
+++ b/update/versions.json
@@ -0,0 +1,17 @@
+{
+	"latest": "2012.12.27",
+	"versions": {
+		"2012.12.27": {
+			"bin": ["http://youtube-dl.org/downloads/2012.12.27/youtube-dl", "3f44f483068d84df0263ea302297d714c0f9b3e9304f277569e667360317bef5"],
+			"exe": ["http://youtube-dl.org/downloads/2012.12.27/youtube-dl.exe", "c4ba76cd1b14a513a54efe51a7662c718eb50a1e241bdf4ecf2c5d68669a005e"],
+			"tar": ["http://youtube-dl.org/downloads/2012.12.27/youtube-dl-2012.12.27.tar.gz", "892a5418a96dc5017cad09e38c7369159bc709d58aa52b111ab9ece219db88f7"],
+			"notes": ["The default output template will switch to a more human-readable format soon. Use --id for the old behavior."]
+		},
+		"2012.12.11": {
+			"bin": ["http://youtube-dl.org/downloads/2012.12.11/youtube-dl", "e2109ac82b05f910828a12b2de0d8e5d3b29b0ed9e2daeb68badb1fce8c1ec7a"],
+			"exe": ["http://youtube-dl.org/downloads/2012.12.11/youtube-dl.exe", "6496a66b69de89835ed7eda03a3c8947cca70d2bd5bcc46bd259a18c01a015b3"],
+			"tar": ["http://youtube-dl.org/downloads/2012.12.11/youtube-dl-2012.12.11.tar.gz", "b6d259c60fefba76701ea0ea7b34c99169fc2644ce1d89ad10213a70d11ffb0f"]
+		}
+	},
+	"signature": "0fc0578a8b9f17ddfcd62f9696ad71966d5b57f92af3b1c5d4744c799125d52458991ea00d1d2effaf0ad1bc5d185d2f402341d5d44dff7a2884dece682935fe2ecab6c36cfba7d05e89153abcb99bebb996f3a5c29faa2422a111513639c76497e789ed9722fdd982d2c772e4a12c1863cb1d2941a7b1234995c610af453a47"
+}
\ No newline at end of file