diff --git a/src/components/views/settings/KeyBackupPanel.js b/src/components/views/settings/KeyBackupPanel.js
index cbbb041228..44244f688b 100644
--- a/src/components/views/settings/KeyBackupPanel.js
+++ b/src/components/views/settings/KeyBackupPanel.js
@@ -250,10 +250,29 @@ export default class KeyBackupPanel extends React.PureComponent {
                     sig.device &&
                     sig.device.getFingerprint() === MatrixClientPeg.get().getDeviceEd25519Key()
                 );
+                const fromThisUser = (
+                    sig.crossSigningId &&
+                    sig.deviceId === MatrixClientPeg.get().getCrossSigningId()
+                );
                 let sigStatus;
-                if (!sig.device) {
+                if (sig.valid && fromThisUser) {
                     sigStatus = _t(
-                        "Backup has a signature from <verify>unknown</verify> device with ID %(deviceId)s.",
+                        "Backup has a <validity>valid</validity> signature from this user",
+                        {}, { validity },
+                    );
+                } else if (!sig.valid && fromThisUser) {
+                    sigStatus = _t(
+                        "Backup has a <validity>invalid</validity> signature from this user",
+                        {}, { validity },
+                    );
+                } else if (sig.crossSigningId) {
+                    sigStatus = _t(
+                        "Backup has a signature from <verify>unknown</verify> user with ID %(deviceId)s",
+                        { deviceId: sig.deviceId }, { verify },
+                    );
+                } else if (!sig.device) {
+                    sigStatus = _t(
+                        "Backup has a signature from <verify>unknown</verify> device with ID %(deviceId)s",
                         { deviceId: sig.deviceId }, { verify },
                     );
                 } else if (sig.valid && fromThisDevice) {
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 2425dfcafa..f6bc9c7c41 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -529,7 +529,10 @@
     "Connect this device to Key Backup": "Connect this device to Key Backup",
     "Backing up %(sessionsRemaining)s keys...": "Backing up %(sessionsRemaining)s keys...",
     "All keys backed up": "All keys backed up",
-    "Backup has a signature from <verify>unknown</verify> device with ID %(deviceId)s.": "Backup has a signature from <verify>unknown</verify> device with ID %(deviceId)s.",
+    "Backup has a <validity>valid</validity> signature from this user": "Backup has a <validity>valid</validity> signature from this user",
+    "Backup has a <validity>invalid</validity> signature from this user": "Backup has a <validity>invalid</validity> signature from this user",
+    "Backup has a signature from <verify>unknown</verify> user with ID %(deviceId)s": "Backup has a signature from <verify>unknown</verify> user with ID %(deviceId)s",
+    "Backup has a signature from <verify>unknown</verify> device with ID %(deviceId)s": "Backup has a signature from <verify>unknown</verify> device with ID %(deviceId)s",
     "Backup has a <validity>valid</validity> signature from this device": "Backup has a <validity>valid</validity> signature from this device",
     "Backup has an <validity>invalid</validity> signature from this device": "Backup has an <validity>invalid</validity> signature from this device",
     "Backup has a <validity>valid</validity> signature from <verify>verified</verify> device <device></device>": "Backup has a <validity>valid</validity> signature from <verify>verified</verify> device <device></device>",