diff --git a/app/mobile/src/session/settings/Settings.jsx b/app/mobile/src/session/settings/Settings.jsx
index ea4f744a..6bd8f432 100644
--- a/app/mobile/src/session/settings/Settings.jsx
+++ b/app/mobile/src/session/settings/Settings.jsx
@@ -1,15 +1,29 @@
-import { useState } from 'react';
-import { ScrollView, View, Text, Switch, TouchableOpacity } from 'react-native';
+import { ActivityIndicator, KeyboardAvoidingView, Modal, ScrollView, View, Switch, Text, TextInput, TouchableOpacity, Alert } from 'react-native';
 import { SafeAreaProvider, SafeAreaView } from 'react-native-safe-area-context';
 import { styles } from './Settings.styled';
 import { useSettings } from './useSettings.hook';
 import MatIcons from 'react-native-vector-icons/MaterialCommunityIcons';
+import Ionicons from 'react-native-vector-icons/AntDesign';
 import Colors from 'constants/Colors';
 
 export function Settings() {
   
   const { state, actions } = useSettings();
 
+  const saveSeal = async () => {
+    try {
+      await actions.saveSeal();
+      actions.hideEditSeal();
+    }
+    catch (err) {
+      console.log(err);
+      Alert.alert(
+        'Failed to Update Topic Sealing',
+        'Please try again.',
+      )
+    }
+  }
+
   return (
     <ScrollView style={styles.content}>
       <SafeAreaView edges={['top']}>
@@ -28,7 +42,7 @@ export function Settings() {
             </View>
           </TouchableOpacity>
           <View style={styles.divider} />
-          <TouchableOpacity style={styles.entry} activeOpacity={1}>
+          <TouchableOpacity style={styles.entry} activeOpacity={1} onPress={actions.showEditSeal}>
             <View style={styles.icon}>
               <MatIcons name="lock-outline" size={20} color={Colors.linkText} />
             </View>
@@ -172,6 +186,164 @@ export function Settings() {
           </TouchableOpacity>
         </View>
 
+        <Modal
+          animationType="fade"
+          transparent={true}
+          visible={state.editSeal}
+          supportedOrientations={['portrait', 'landscape']}
+          onRequestClose={actions.hideEditSeal}
+        >
+          <KeyboardAvoidingView behavior="height" style={styles.modalWrapper}>
+            <View style={styles.modalContainer}>
+              <Text style={styles.modalHeader}>Sealed Topics:</Text>
+              <View style={styles.sealable}>
+                <TouchableOpacity onPress={() => actions.setSealEnable(!state.sealEnabled)} activeOpacity={1}>
+                  <Text style={styles.sealableText}>Enable Sealed Topics</Text>
+                </TouchableOpacity>
+                <Switch style={styles.enableSwitch} value={state.sealEnabled} onValueChange={actions.setSealEnable} trackColor={styles.switch}/>
+              </View>
+              { state.sealMode === 'unlocking' && (
+                <>
+                  { !state.showSealUnlock && (
+                    <View style={styles.inputField}>
+                      <TextInput style={styles.input} value={state.sealUnlock} onChangeText={actions.setSealUnlock}
+                          autoCapitalize={'none'} secureTextEntry={true} placeholder="Password for Seal"
+                          placeholderTextColor={Colors.grey} />
+                      <TouchableOpacity onPress={actions.showSealUnlock}>
+                        <Ionicons style={styles.icon} name="eyeo" size={18} color="#888888" />
+                      </TouchableOpacity>
+                    </View>
+                  )}
+                  { state.showSealUnlock && (
+                    <View style={styles.inputField}>
+                      <TextInput style={styles.input} value={state.sealUnlock} onChangeText={actions.setSealUnlock}
+                          autoCapitalize={'none'} secureTextEntry={false} placeholder="Password for Seal"
+                          placeholderTextColor={Colors.grey} />
+                      <TouchableOpacity onPress={actions.hideSealUnlock}>
+                        <Ionicons style={styles.icon} name="eye" size={18} color="#888888" />
+                      </TouchableOpacity>
+                    </View>
+                  )}
+                </>
+              )}
+              { (state.sealMode === 'updating' || state.sealMode === 'enabling') && (
+                <>
+                  { !state.showSealPassword && (
+                    <View style={styles.inputField}>
+                      <TextInput style={styles.input} value={state.sealPassword} onChangeText={actions.setSealPassword}
+                          autoCapitalize={'none'} secureTextEntry={true} placeholder="Password for Seal"
+                          placeholderTextColor={Colors.grey} />
+                      <TouchableOpacity onPress={actions.showSealPassword}>
+                        <Ionicons style={styles.icon} name="eyeo" size={18} color="#888888" />
+                      </TouchableOpacity>
+                    </View>
+                  )}
+                  { state.showSealPassword && (
+                    <View style={styles.inputField}>
+                      <TextInput style={styles.input} value={state.sealPassword} onChangeText={actions.setSealPassword}
+                          autoCapitalize={'none'} secureTextEntry={false} placeholder="Password for Seal"
+                          placeholderTextColor={Colors.grey} />
+                      <TouchableOpacity onPress={actions.hideSealPassword}>
+                        <Ionicons style={styles.icon} name="eye" size={18} color="#888888" />
+                      </TouchableOpacity>
+                    </View>
+                  )}
+                  { !state.showSealConfirm && (
+                    <View style={styles.inputField}>
+                      <TextInput style={styles.input} value={state.sealConfirm} onChangeText={actions.setSealConfirm}
+                          autoCapitalize={'none'} secureTextEntry={true} placeholder="Confirm Password"
+                          placeholderTextColor={Colors.grey} />
+                      <TouchableOpacity onPress={actions.showSealConfirm}>
+                        <Ionicons style={styles.icon} name="eyeo" size={18} color="#888888" />
+                      </TouchableOpacity>
+                    </View>
+                  )}
+                  { state.showSealConfirm && (
+                    <View style={styles.inputField}>
+                      <TextInput style={styles.input} value={state.sealConfirm} onChangeText={actions.setSealConfirm}
+                          autoCapitalize={'none'} secureTextEntry={false} placeholder="Confirm Password"
+                          placeholderTextColor={Colors.grey} />
+                      <TouchableOpacity onPress={actions.hideSealConfirm}>
+                        <Ionicons style={styles.icon} name="eye" size={18} color="#888888" />
+                      </TouchableOpacity>
+                    </View>
+                  )}
+                  <Text style={styles.notice}>saving can take a few minutes</Text>
+                </>
+              )}
+              { state.sealMode === 'disabling' && (
+                <View style={styles.inputField}>
+                  <Ionicons style={styles.warn} name="exclamationcircleo" size={18} color="#888888" />
+                  <TextInput style={styles.input} value={state.sealDelete} onChangeText={actions.setSealDelete}
+                      autoCapitalize={'none'} placeholder="Type 'delete' to remove sealing key"
+                      placeholderTextColor={Colors.grey} />
+                </View>
+              )}
+              { state.sealMode === 'unlocked' && (
+                <View style={styles.inputField}>
+                  <TextInput style={styles.input} value={'xxxxxxxx'} editable={false} secureTextEntry={true} />
+                  <Ionicons style={styles.icon} name="eyeo" size={18} color="#888888" />
+                  <TouchableOpacity style={styles.sealUpdate} onPress={actions.updateSeal} />
+                </View>
+              )}
+              <View style={styles.modalControls}>
+                <TouchableOpacity style={styles.cancel} onPress={actions.hideEditSeal}>
+                  <Text style={styles.canceltext}>Cancel</Text>
+                </TouchableOpacity>
+                { state.canSaveSeal && (
+                  <>
+                    { state.sealMode !== 'unlocking' && state.sealMode !== 'unlocked' && (
+                      <TouchableOpacity style={styles.save} onPress={saveSeal}>
+                        { state.saving && (
+                          <ActivityIndicator style={styles.activity} color={Colors.white} />
+                        )}
+                        <Text style={styles.saveText}>Save</Text>
+                      </TouchableOpacity>
+                    )}
+                    { state.sealMode === 'unlocked' && (
+                      <TouchableOpacity style={styles.save} onPress={saveSeal}>
+                        { state.saving && (
+                          <ActivityIndicator style={styles.activity} color={Colors.white} />
+                        )}
+                        <Text style={styles.saveText}>Forget</Text>
+                      </TouchableOpacity>
+                    )}
+                    { state.sealMode === 'unlocking' && (
+                      <TouchableOpacity style={styles.save} onPress={saveSeal}>
+                        { state.saving && (
+                          <ActivityIndicator style={styles.activity} color={Colors.white} />
+                        )}
+                        <Text style={styles.saveText}>Unlock</Text>
+                      </TouchableOpacity>
+                    )}
+                  </>
+                )}
+                { !state.canSaveSeal && (
+                  <>
+                    { state.sealMode !== 'unlocking' && (
+                      <View style={styles.disabled}>
+                        { state.saving && (
+                          <ActivityIndicator style={styles.activity} color={Colors.white} />
+                        )}
+                        <Text style={styles.disabledText}>Save</Text>
+                      </View>
+                    )}
+                    { state.sealMode === 'unlocking' && (
+                      <View style={styles.disabled}>
+                        { state.saving && (
+                          <ActivityIndicator style={styles.activity} color={Colors.white} />
+                        )}
+                        <Text style={styles.disabledText}>Unlock</Text>
+                      </View>
+                    )}
+                  </>
+                )}
+
+              </View>
+            </View>
+          </KeyboardAvoidingView>
+        </Modal>
+
       </SafeAreaView>
     </ScrollView>
   );
diff --git a/app/mobile/src/session/settings/Settings.styled.js b/app/mobile/src/session/settings/Settings.styled.js
index 85278c0e..3116913f 100644
--- a/app/mobile/src/session/settings/Settings.styled.js
+++ b/app/mobile/src/session/settings/Settings.styled.js
@@ -104,5 +104,127 @@ export const styles = StyleSheet.create({
   notifications: {
     transform: [{ scaleX: .6 }, { scaleY: .6 }],
   },
+
+  modalWrapper: {
+    display: 'flex',
+    width: '100%',
+    height: '100%',
+    alignItems: 'center',
+    justifyContent: 'center',
+    backgroundColor: 'rgba(52, 52, 52, 0.8)'
+  },
+  modalContainer: {
+    backgroundColor: Colors.formBackground,
+    padding: 16,
+    width: '80%',
+    maxWidth: 400,
+  },
+  modalHeader: {
+    fontSize: 18,
+    paddingBottom: 16,
+    color: Colors.text,
+  },
+  input: {
+    fontSize: 14,
+    flexGrow: 1,
+    color: Colors.text,
+  },
+  inputField: {
+    width: '100%',
+    borderWidth: 1,
+    borderColor: Colors.lightgrey,
+    borderRadius: 4,
+    padding: 8, 
+    marginBottom: 8,
+    maxHeight: 92,
+    display: 'flex',
+    flexDirection: 'row',
+  },
+  canceltext: {
+    color: Colors.text,
+  },
+  modalList: {
+    width: '100%', 
+    borderWidth: 1,
+    borderColor: Colors.lightgrey,
+    borderRadius: 2,
+  },
+  modalControls: {
+    display: 'flex',
+    flexDirection: 'row',
+    justifyContent: 'flex-end',
+  },
+  cancel: {
+    borderWidth: 1,
+    borderColor: Colors.lightgrey,
+    borderRadius: 4,
+    padding: 8,
+    marginRight: 8,
+    width: 88,
+    display: 'flex',
+    alignItems: 'center',
+  },
+  save: {
+    padding: 8,
+    borderRadius: 4,
+    backgroundColor: Colors.primary,
+    width: 88,
+    display: 'flex',
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  saveText: {
+    color: Colors.white,
+  },
+  disabled: {
+    borderWidth: 1,
+    borderColor: Colors.lightgrey,
+    padding: 8,
+    borderRadius: 4,
+    width: 88,
+    display: 'flex',
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  activity: {
+    paddingRight: 4,
+  },
+  disabledText: {
+    color: Colors.disabled,
+  },
+  sealUpdate: {
+    position: 'absolute',
+    top: 0,
+    height: 36,
+    left: 8,
+    width: '100%',
+  },
+  sealableText: {
+    color: Colors.text,
+  },
+  sealable: {
+    display: 'flex',
+    flexDirection: 'row',
+    alignItems: 'center',
+    paddingBottom: 16,
+  },
+  enable: {
+    display: 'flex',
+    flexDirection: 'row',
+    justifyContent: 'center',
+    alignItems: 'center',
+    justifyContent: 'center',
+    width: '100%',
+    marginBottom: 4,
+  },
+  enableText: {
+    color: Colors.primary,
+    fontSize: 16,
+  },
+  enableSwitch: {
+    transform: [{ scaleX: .6 }, { scaleY: .6 }],
+  },
 });
 
diff --git a/app/mobile/src/session/settings/useSettings.hook.js b/app/mobile/src/session/settings/useSettings.hook.js
index 5cf92f6a..6f6b54c1 100644
--- a/app/mobile/src/session/settings/useSettings.hook.js
+++ b/app/mobile/src/session/settings/useSettings.hook.js
@@ -1,15 +1,34 @@
 import { useState, useEffect, useRef, useContext } from 'react';
 import { getLanguageStrings } from 'constants/Strings';
 import { ProfileContext } from 'context/ProfileContext';
+import { AccountContext } from 'context/AccountContext';
+import { generateSeal, updateSeal, unlockSeal } from 'context/sealUtil';
 
 export function useSettings() {
 
   const profile = useContext(ProfileContext);
+  const account = useContext(AccountContext);
 
   const [state, setState] = useState({
     strings: getLanguageStrings(),
     timeFull: false,
     monthLast: false,
+
+    editSeal: false,
+    sealMode: null,
+    sealUnlock: null,
+    sealPassword: null,
+    sealConfirm: null,
+    sealDelete: null,
+    seal: null,
+    sealKey: null,
+    sealEnabled: false,
+    sealUnlocked: false,
+    sealable: false,
+    canSaveSeal: false,
+    showSealUnlock: false,
+    showSealConfirm: false,
+    showSealPassword: false,
   });
 
   const updateState = (value) => {
@@ -19,7 +38,57 @@ export function useSettings() {
   useEffect(() => {
     const { timeFull, monthLast } = profile.state;
     updateState({ timeFull, monthLast });
-  }, [profile.state]);
+  }, [profile.state.timeFull, profile.state.monthLast]);
+
+  useEffect(() => {
+    const { seal, sealable } = account.state.status;
+    const sealKey = account.state.sealKey;
+    const sealEnabled = seal?.publicKey != null;
+    const sealUnlocked = seal?.publicKey === sealKey?.public && sealKey?.private && sealKey?.public;
+    updateState({ sealable, seal, sealKey, sealEnabled, sealUnlocked });
+  }, [account.state]);
+
+  const unlock = async () => {
+    const sealKey = unlockSeal(state.seal, state.sealUnlock);
+    await account.actions.unlockAccountSeal(sealKey);
+  };
+
+  const forget = async () => {
+    await account.actions.unlockAccountSeal({});
+  }
+
+  const update = async () => {
+    const updated = updateSeal(state.seal, state.sealKey, state.sealPassword);
+    await account.actions.setAccountSeal(updated.seal, updated.sealKey);
+  }
+
+  const enable = async () => {
+    const created = await generateSeal(state.sealPassword);
+    await account.actions.setAccountSeal(created.seal, created.sealKey);
+  }
+
+  const disable = async () => {
+    await account.actions.setAccountSeal({}, {});
+  }
+
+  useEffect(() => {
+    if (state.sealMode === 'unlocked') {
+      return updateState({ canSaveSeal: true });
+    }
+    if (state.sealMode === 'unlocking' && state.sealUnlock != null && state.sealUnlock !== '') {
+      return updateState({ canSaveSeal: true });
+    }
+    if (state.sealMode === 'enabling' && state.sealPassword != null && state.sealPassword === state.sealConfirm) {
+      return updateState({ canSaveSeal: true });
+    }
+    if (state.sealMode === 'disabling' && state.sealDelete === 'delete') {
+      return updateState({ canSaveSeal: true });
+    }
+    if (state.sealMode === 'updating' && state.sealPassword != null && state.sealPassword === state.sealConfirm) {
+      return updateState({ canSaveSeal: true });
+    }
+    updateState({ canSaveSeal: false });
+  }, [state.sealMode, state.sealable, state.sealUnlock, state.sealPassword, state.sealConfirm, state.sealDelete]);
 
   const actions = {
     setTimeFull: async (flag) => {
@@ -30,6 +99,89 @@ export function useSettings() {
       updateState({ monthLast: flag });
       await profile.actions.setMonthLast(flag);
     },
+    showEditSeal: () => {
+      let sealMode = null;
+      const sealable = state.sealEnabled;
+      if (state.sealEnabled && !state.sealUnlocked) {
+        sealMode = 'unlocking';
+      }
+      else if (state.sealEnabled && state.sealUnlocked) {
+        sealMode = 'unlocked';
+      }
+      else {
+        sealMode = 'disabled';
+      }
+      updateState({ editSeal: true, sealMode, sealUnlock: null, sealPassword: null, sealConfirm: null, sealDelete: null });
+    },
+    hideEditSeal: () => {
+      updateState({ editSeal: false });
+    },
+    setSealUnlock: (sealUnlock) => {
+      updateState({ sealUnlock });
+    },
+    setSealPassword: (sealPassword) => {
+      updateState({ sealPassword });
+    },
+    setSealConfirm: (sealConfirm) => {
+      updateState({ sealConfirm });
+    },
+    setSealDelete: (sealDelete) => {
+      updateState({ sealDelete });
+    },
+    showSealUnlock: () => {
+      updateState({ showSealUnlock: true });
+    },
+    hideSealUnlock: () => {
+      updateState({ showSealUnlock: false });
+    },
+    showSealPassword: () => {
+      updateState({ showSealPassword: true });
+    },
+    hideSealPassword: () => {
+      updateState({ showSealPassword: false });
+    },
+    showSealConfirm: () => {
+      updateState({ showSealConfirm: true });
+    },
+    hideSealConfirm: () => {
+      updateState({ showSealConfirm: false });
+    },
+    updateSeal: () => {
+      updateState({ sealMode: 'updating' });
+    },
+    saveSeal: async () => {
+      if (!state.saving) {
+        try {
+          updateState({ saving: true });
+
+          if (state.sealMode === 'enabling') {
+            await enable();
+          }
+          else if (state.sealMode === 'disabling') {
+            await disable();
+          }
+          else if (state.sealMode === 'unlocking') {
+            await unlock();
+          }
+          else if (state.sealMode === 'unlocked') {
+            await forget();
+          }
+          else if (state.sealMode === 'updating') {
+            await update();
+          }
+          else {
+            console.log(state.sealMode);
+          }
+
+          updateState({ saving: false });
+        }
+        catch(err) {
+          console.log(err);
+          updateState({ saving: false });
+          throw new Error('seal operation failed');
+        }
+      }
+    },
   };
 
   return { state, actions };