diff --git a/src/components/views/dialogs/EncryptedEventDialog.js b/src/components/views/dialogs/EncryptedEventDialog.js
new file mode 100644
index 0000000000..c8bcc52a06
--- /dev/null
+++ b/src/components/views/dialogs/EncryptedEventDialog.js
@@ -0,0 +1,123 @@
+/*
+Copyright 2015, 2016 OpenMarket Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+var React = require("react");
+var sdk = require('../../../index');
+var MatrixClientPeg = require("../../../MatrixClientPeg");
+
+module.exports = React.createClass({
+    displayName: 'EncryptedEventDialog',
+
+    propTypes: {
+        onFinished: React.PropTypes.func,
+    },
+
+    componentWillMount: function() {
+        var client = MatrixClientPeg.get();
+        client.on("deviceVerificationChanged", this.onDeviceVerificationChanged);
+    },
+
+    componentWillUnmount: function() {
+        var client = MatrixClientPeg.get();
+        if (client) {
+            client.removeListener("deviceVerificationChanged", this.onDeviceVerificationChanged);
+        }
+    },
+
+    refreshDevice: function() {
+        // XXX: gutwrench - is there any reason not to expose this on MatrixClient itself?
+        return MatrixClientPeg.get()._crypto.getDeviceByIdentityKey(
+                    this.props.event.getSender(),
+                    this.props.event.getWireContent().algorithm,
+                    this.props.event.getWireContent().sender_key
+                );
+    },
+
+    getInitialState: function() {
+        return { device: this.refreshDevice() };
+    },
+
+    onDeviceVerificationChanged: function(userId, device) {
+        if (userId == this.props.event.getSender()) {
+            this.setState({ device: this.refreshDevice() });
+        }
+    },
+
+    render: function() {
+        var event = this.props.event;
+        var device = this.state.device;
+
+        var MemberDeviceInfo = sdk.getComponent('rooms.MemberDeviceInfo');
+
+        return (
+            <div className="mx_EncryptedEventDialog">
+                <div className="mx_Dialog_title">
+                    End-to-end encryption information
+                </div>
+                <div className="mx_Dialog_content">
+                    <table>
+                        <tbody>
+                            <tr>
+                                <td>Sent by</td>
+                                <td>{ event.getSender() }</td>
+                            </tr>
+                            <tr>
+                                <td>Sender device name</td>
+                                <td>{ device.getDisplayName() }</td>
+                            </tr>
+                            <tr>
+                                <td>Sender device ID</td>
+                                <td>{ device.deviceId }</td>
+                            </tr>
+                            <tr>
+                                <td>Sender device verification:</td>
+                                <td>{ MatrixClientPeg.get().isEventSenderVerified(event) ? "verified" : <b>NOT verified</b> }</td>
+                            </tr>
+                            <tr>
+                                <td>Sender device ed25519 fingerprint</td>
+                                <td>{ device.getFingerprint() }</td>
+                            </tr>
+                            <tr>
+                                <td>Sender device curve25519 identity key</td>
+                                <td>{ event.getWireContent().sender_key }</td>
+                            </tr>
+                            <tr>
+                                <td>Algorithm</td>
+                                <td>{ event.getWireContent().algorithm }</td>
+                            </tr>
+                        {
+                            event.getContent().msgtype === 'm.bad.encrypted' ? (
+                            <tr>
+                                <td>Decryption error</td>
+                                <td>{ event.getContent().body }</td>
+                            </tr>
+                            ) : ''
+                        }
+                        </tbody>
+                    </table>
+                </div>
+                <div className="mx_Dialog_buttons">
+                    <button className="mx_Dialog_primary" onClick={ this.props.onFinished } autoFocus={ true }>
+                        OK
+                    </button>
+                    <MemberDeviceInfo ref="memberDeviceInfo" hideInfo={true} device={ this.state.device } userId={ this.props.event.getSender() }/>
+                </div>
+            </div>
+        );
+    }
+});
+
+