diff --git a/pre_commit_hooks/detect_private_key.py b/pre_commit_hooks/detect_private_key.py
index 58ed827..693e59e 100644
--- a/pre_commit_hooks/detect_private_key.py
+++ b/pre_commit_hooks/detect_private_key.py
@@ -9,6 +9,8 @@ BLACKLIST = [
     b'BEGIN EC PRIVATE KEY',
     b'BEGIN OPENSSH PRIVATE KEY',
     b'BEGIN PRIVATE KEY',
+    b'PuTTY-User-Key-File-2',
+    b'BEGIN SSH2 ENCRYPTED PRIVATE KEY',
 ]
 
 
diff --git a/tests/detect_private_key_test.py b/tests/detect_private_key_test.py
index c6558ba..fdd63a2 100644
--- a/tests/detect_private_key_test.py
+++ b/tests/detect_private_key_test.py
@@ -8,6 +8,8 @@ TESTS = (
     (b'-----BEGIN DSA PRIVATE KEY-----', 1),
     (b'-----BEGIN EC PRIVATE KEY-----', 1),
     (b'-----BEGIN OPENSSH PRIVATE KEY-----', 1),
+    (b'PuTTY-User-Key-File-2: ssh-rsa', 1),
+    (b'---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----', 1),
     (b'ssh-rsa DATA', 0),
     (b'ssh-dsa DATA', 0),
     # Some arbitrary binary data