diff --git a/README.md b/README.md
index d44bab9b..ee551706 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Written in Qt/QML + Python with [nio](https://github.com/poljar/matrix-nio),
 - **Multiple accounts** in one client
 - Set your display name and profile picture
 - Import/export **E2E** key files
-- Inspect, rename and manually verify your sessions
+- Inspect, rename, manually verify and sign out one or multiple sessions
 
 ### Rooms
 
diff --git a/TODO.md b/TODO.md
index 1fcc9657..a34bc593 100644
--- a/TODO.md
+++ b/TODO.md
@@ -185,7 +185,6 @@
 - E2E
   - List and verify other users's devices
   - SAS verification
-  - Delete devices (do that in key verification popup instead of blacklisting)
   - Request room keys from own other devices
   - Auto-trust accounts within the same client
   - Provide help when undecryptable messages occur, including:
diff --git a/src/backend/errors.py b/src/backend/errors.py
index 5d3a3923..dcb6aa6e 100644
--- a/src/backend/errors.py
+++ b/src/backend/errors.py
@@ -33,6 +33,12 @@ class MatrixError(Exception):
         return cls(response.transport_response.status, response.status_code)
 
 
+@dataclass
+class MatrixUnauthorized(MatrixError):
+    http_code: int = 401
+    m_code:    str = "M_UNAUTHORIZED"
+
+
 @dataclass
 class MatrixForbidden(MatrixError):
     http_code: int = 403
diff --git a/src/backend/matrix_client.py b/src/backend/matrix_client.py
index 9fcb4f83..a1e2f307 100644
--- a/src/backend/matrix_client.py
+++ b/src/backend/matrix_client.py
@@ -34,8 +34,8 @@ from nio.crypto import async_generator_from_data
 from . import __app_name__, __display_name__, utils
 from .errors import (
     BadMimeType, InvalidUserId, InvalidUserInContext, MatrixBadGateway,
-    MatrixError, MatrixNotFound, MatrixTooLarge, UneededThumbnail,
-    UserFromOtherServerDisallowed,
+    MatrixError, MatrixNotFound, MatrixTooLarge, MatrixUnauthorized,
+    UneededThumbnail, UserFromOtherServerDisallowed,
 )
 from .html_markdown import HTML_PROCESSOR as HTML
 from .media_cache import Media, Thumbnail
@@ -1347,6 +1347,23 @@ class MatrixClient(nio.AsyncClient):
         self.blacklist_device(self.olm.device_store[user_id][device_id])
 
 
+    async def delete_devices_with_password(
+        self, device_ids: List[str], password: str,
+    ) -> None:
+        """Delete devices, authentifying using the account's password."""
+
+        auth = {
+            "type":     "m.login.password",
+            "user":     self.user_id,
+            "password": password,
+        }
+
+        resp = await super().delete_devices(device_ids, auth)
+
+        if isinstance(resp, nio.DeleteDevicesAuthResponse):
+            raise MatrixUnauthorized()
+
+
     # Functions to register/modify data into models
 
     async def update_account_unread_counts(self) -> None:
diff --git a/src/gui/Pages/AccountSettings/Sessions.qml b/src/gui/Pages/AccountSettings/Sessions.qml
index 27e8065d..768af4b3 100644
--- a/src/gui/Pages/AccountSettings/Sessions.qml
+++ b/src/gui/Pages/AccountSettings/Sessions.qml
@@ -53,16 +53,32 @@ HColumnPage {
     }
 
     function deleteDevices(...indice) {
-        const deviceIds = []
+        if (indice.length === 1 && indice[0] === 0) {
+            utils.makePopup("Popups/SignOutPopup.qml", { userId: page.userId })
+            return
+        }
 
-        for (const i of indice.sort())
+        const deviceIds     = []
+        let deleteOwnDevice = false
+
+        for (const i of indice.sort()) {
+            i === 0 ?
+            deleteOwnDevice = true :
             deviceIds.push(deviceList.model.get(i).id)
+        }
 
         utils.makePopup(
-            "Popups/AuthentificationPopup.qml",
+            "Popups/DeleteDevicesPopup.qml",
             {
                 userId: page.userId,
                 deviceIds,
+                deletedCallback: () => {
+                    deleteOwnDevice ?
+                    utils.makePopup(
+                        "Popups/SignOutPopup.qml", { userId: page.userId },
+                    ) :
+                    page.loadDevices()
+                },
             },
         )
     }
diff --git a/src/gui/Popups/AuthentificationPopup.qml b/src/gui/Popups/AuthentificationPopup.qml
deleted file mode 100644
index 929d0d63..00000000
--- a/src/gui/Popups/AuthentificationPopup.qml
+++ /dev/null
@@ -1,25 +0,0 @@
-// SPDX-License-Identifier: LGPL-3.0-or-later
-
-import QtQuick 2.12
-import "../Base"
-import "../Base/ButtonLayout"
-
-HFlickableColumnPopup {
-    id: popup
-
-
-    property string userId
-    property string deviceIds
-
-
-    page.footer: ButtonLayout {
-        CancelButton {
-            id: cancelButton
-            onClicked: popup.close()
-        }
-    }
-
-    onOpened: cancelButton.forceActiveFocus()
-
-    SummaryLabel { text: qsTr("Not implemented yet") }
-}
diff --git a/src/gui/Popups/DeleteDevicesPopup.qml b/src/gui/Popups/DeleteDevicesPopup.qml
new file mode 100644
index 00000000..ae2422a6
--- /dev/null
+++ b/src/gui/Popups/DeleteDevicesPopup.qml
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+import QtQuick 2.12
+import "../Base"
+import "../Base/ButtonLayout"
+
+PasswordPopup {
+    id: popup
+
+
+    property string userId
+    property var deviceIds  // array
+    property var deletedCallback: null
+
+
+    function verifyPassword(pass, callback) {
+        py.callClientCoro(
+            userId,
+            "delete_devices_with_password",
+            [deviceIds, pass],
+            () => callback(true),
+            (type, args) => {
+                callback(
+                    type === "MatrixUnauthorized" ?
+                    false :
+                    qsTr("Unknown error: %1 - %2").arg(type).arg(args)
+                )
+            },
+        )
+    }
+
+    summary.text:
+        qsTr("Enter your account's password to continue:")
+
+
+    validateButton.text: qsTr("Sign out")
+    validateButton.icon.name: "sign-out"
+
+    onClosed: if (acceptedPassword && deletedCallback) deletedCallback()
+}