diff --git a/keydata.go b/keydata.go
index 41858faf..7ba339de 100644
--- a/keydata.go
+++ b/keydata.go
@@ -588,6 +588,11 @@ func (d *KeyData) openWithPassphrase(passphrase string, kdf KDF) (payload []byte
 	return payload, key, nil
 }
 
+// PlatformName returns the name of the platform that handles this key data.
+func (d *KeyData) PlatformName() string {
+	return d.data.PlatformName
+}
+
 // ReadableName returns a human-readable name for this key data, useful for
 // including in errors.
 func (d *KeyData) ReadableName() string {
diff --git a/keydata_test.go b/keydata_test.go
index 466cf846..735f2ac4 100644
--- a/keydata_test.go
+++ b/keydata_test.go
@@ -543,6 +543,14 @@ func (s *keyDataSuite) TestNewKeyData(c *C) {
 	c.Check(err, IsNil)
 }
 
+func (s *keyDataSuite) TestKeyDataPlatformName(c *C) {
+	key, auxKey := s.newKeyDataKeys(c, 32, 32)
+	protected := s.mockProtectKeys(c, key, auxKey, crypto.SHA256)
+	keyData, err := NewKeyData(protected)
+	c.Assert(err, IsNil)
+	c.Check(keyData.PlatformName(), Equals, mockPlatformName)
+}
+
 func (s *keyDataSuite) TestUnmarshalPlatformHandle(c *C) {
 	key, auxKey := s.newKeyDataKeys(c, 32, 32)
 	protected := s.mockProtectKeys(c, key, auxKey, crypto.SHA256)