diff --git a/lib/shared/state-sync/current-user-state-sync-spec.js b/lib/shared/state-sync/current-user-state-sync-spec.js
index d1d3129a8..11fdb94df 100644
--- a/lib/shared/state-sync/current-user-state-sync-spec.js
+++ b/lib/shared/state-sync/current-user-state-sync-spec.js
@@ -1,27 +1,40 @@
 // @flow
 
+import { createSelector } from 'reselect';
+
 import type { StateSyncSpec } from './state-sync-spec.js';
+import type { AppState } from '../../types/redux-types';
 import {
   type CurrentUserInfo,
   currentUserInfoValidator,
 } from '../../types/user-types.js';
 import { convertClientIDsToServerIDs } from '../../utils/conversion-utils.js';
+import { hash } from '../../utils/objects.js';
 import { ashoatKeyserverID } from '../../utils/validation-utils.js';
 
 export const currentUserStateSyncSpec: StateSyncSpec<
   CurrentUserInfo,
   CurrentUserInfo,
   void,
 > = Object.freeze({
   hashKey: 'currentUserInfo',
   convertClientToServerInfos(info: CurrentUserInfo) {
     return convertClientIDsToServerIDs(
       ashoatKeyserverID,
       currentUserInfoValidator,
       info,
     );
   },
   findStoreInconsistencies() {
     return undefined;
   },
+  selector: createSelector(
+    (state: AppState) => state.currentUserInfo,
+    currentUserInfo => ({
+      ...currentUserStateSyncSpec,
+      getInfoHash: () => hash(currentUserInfo),
+      getAllInfosHash: () => hash(currentUserInfo),
+      getIDs: () => [],
+    }),
+  ),
 });
diff --git a/lib/shared/state-sync/entries-state-sync-spec.js b/lib/shared/state-sync/entries-state-sync-spec.js
index 7c2d1e975..c61a7f3a5 100644
--- a/lib/shared/state-sync/entries-state-sync-spec.js
+++ b/lib/shared/state-sync/entries-state-sync-spec.js
@@ -1,92 +1,125 @@
 // @flow
 
 import _isEqual from 'lodash/fp/isEqual.js';
+import { createSelector } from 'reselect';
 import t from 'tcomb';
 
 import type { StateSyncSpec } from './state-sync-spec.js';
 import {
   type CalendarQuery,
   type RawEntryInfos,
   rawEntryInfoValidator,
   type RawEntryInfo,
 } from '../../types/entry-types.js';
+import type { AppState } from '../../types/redux-types.js';
 import {
   reportTypes,
   type ClientEntryInconsistencyReportCreationRequest,
 } from '../../types/report-types.js';
 import type { ProcessServerRequestAction } from '../../types/request-types.js';
 import { actionLogger } from '../../utils/action-logger.js';
 import { getConfig } from '../../utils/config.js';
 import { convertClientIDsToServerIDs } from '../../utils/conversion-utils.js';
-import { values } from '../../utils/objects.js';
+import { values, combineUnorderedHashes, hash } from '../../utils/objects.js';
 import { generateReportID } from '../../utils/report-utils.js';
 import { sanitizeActionSecrets } from '../../utils/sanitization.js';
 import { ashoatKeyserverID, tID } from '../../utils/validation-utils.js';
 import {
   filterRawEntryInfosByCalendarQuery,
   serverEntryInfosObject,
 } from '../entry-utils.js';
 
 export const entriesStateSyncSpec: StateSyncSpec<
   RawEntryInfos,
   RawEntryInfo,
   $ReadOnlyArray<ClientEntryInconsistencyReportCreationRequest>,
 > = Object.freeze({
   hashKey: 'entryInfos',
   innerHashSpec: {
     hashKey: 'entryInfo',
     deleteKey: 'deleteEntryIDs',
     rawInfosKey: 'rawEntryInfos',
   },
   convertClientToServerInfos(
     infos: RawEntryInfos,
     calendarQuery: CalendarQuery,
   ) {
     const filteredEntryInfos = filterRawEntryInfosByCalendarQuery(
       serverEntryInfosObject(values(infos)),
       calendarQuery,
     );
 
     return convertClientIDsToServerIDs(
       ashoatKeyserverID,
       t.dict(tID, rawEntryInfoValidator),
       filteredEntryInfos,
     );
   },
   findStoreInconsistencies(
     action: ProcessServerRequestAction,
     beforeStateCheck: RawEntryInfos,
     afterStateCheck: RawEntryInfos,
   ) {
     const calendarQuery = action.payload.calendarQuery;
     // We don't want to bother reporting an inconsistency if it's just because
     // of extraneous EntryInfos (not within the current calendarQuery) on either
     // side
     const filteredBeforeResult = filterRawEntryInfosByCalendarQuery(
       serverEntryInfosObject(values(beforeStateCheck)),
       calendarQuery,
     );
     const filteredAfterResult = filterRawEntryInfosByCalendarQuery(
       serverEntryInfosObject(values(afterStateCheck)),
       calendarQuery,
     );
     if (_isEqual(filteredBeforeResult)(filteredAfterResult)) {
       return emptyArray;
     }
     return [
       {
         type: reportTypes.ENTRY_INCONSISTENCY,
         platformDetails: getConfig().platformDetails,
         beforeAction: beforeStateCheck,
         action: sanitizeActionSecrets(action),
         calendarQuery,
         pushResult: afterStateCheck,
         lastActions: actionLogger.interestingActionSummaries,
         time: Date.now(),
         id: generateReportID(),
       },
     ];
   },
+  selector: createSelector(
+    (state: AppState) => state.entryStore.entryInfos,
+    entryInfos => ({
+      ...entriesStateSyncSpec,
+      getInfoHash: id => hash(entryInfos[`${ashoatKeyserverID}|${id}`]),
+      getAllInfosHash: calendarQuery =>
+        getEntryInfosHash(entryInfos, calendarQuery),
+      getIDs: calendarQuery => getEntryIDs(entryInfos, calendarQuery),
+    }),
+  ),
 });
 
 const emptyArray = [];
+
+function getEntryInfosHash(
+  entryInfos: RawEntryInfos,
+  calendarQuery: CalendarQuery,
+) {
+  const filteredEntryInfos = filterRawEntryInfosByCalendarQuery(
+    serverEntryInfosObject(values(entryInfos)),
+    calendarQuery,
+  );
+
+  return combineUnorderedHashes(Object.values(filteredEntryInfos).map(hash));
+}
+
+function getEntryIDs(entryInfos: RawEntryInfos, calendarQuery: CalendarQuery) {
+  const filteredEntryInfos = filterRawEntryInfosByCalendarQuery(
+    serverEntryInfosObject(values(entryInfos)),
+    calendarQuery,
+  );
+
+  return Object.keys(filteredEntryInfos).map(id => id.split('|')[1]);
+}
diff --git a/lib/shared/state-sync/state-sync-spec.js b/lib/shared/state-sync/state-sync-spec.js
index dab9175a1..2cf1d4ddd 100644
--- a/lib/shared/state-sync/state-sync-spec.js
+++ b/lib/shared/state-sync/state-sync-spec.js
@@ -1,23 +1,39 @@
 // @flow
 
 import type { CalendarQuery } from '../../types/entry-types.js';
+import type { AppState } from '../../types/redux-types.js';
 import type { ProcessServerRequestAction } from '../../types/request-types.js';
 
 export type StateSyncSpec<Infos, Info, Inconsistencies> = {
   +hashKey: string,
   +innerHashSpec?: {
     +hashKey: string,
     +deleteKey: string,
     +rawInfosKey: string,
     +additionalDeleteCondition?: Info => boolean,
   },
   +convertClientToServerInfos: (
     infos: Infos,
     calendarQuery: CalendarQuery,
   ) => Infos,
   +findStoreInconsistencies: (
     action: ProcessServerRequestAction,
     beforeStateCheck: Infos,
     afterStateCheck: Infos,
   ) => Inconsistencies,
+  +selector: (
+    state: AppState,
+  ) => BoundStateSyncSpec<Infos, Info, Inconsistencies>,
+};
+
+// All ids specified here (getInfoHash and getIDs) are server ids.
+// E.g. in the case of threadStore or entryStore the keyserver prefix
+// needs to be handled additionaly
+export type BoundStateSyncSpec<Infos, Info, Inconsistencies> = {
+  // If these function depend on background hashing that is still not complete
+  // they should return  null, to indicate that the hashes aren't available yet
+  +getInfoHash: (id: string) => ?number,
+  +getAllInfosHash: (query: CalendarQuery) => ?number,
+  +getIDs: (query: CalendarQuery) => ?Array<string>,
+  ...StateSyncSpec<Infos, Info, Inconsistencies>,
 };
diff --git a/lib/shared/state-sync/threads-state-sync-spec.js b/lib/shared/state-sync/threads-state-sync-spec.js
index 1e90a7b71..36ce61cac 100644
--- a/lib/shared/state-sync/threads-state-sync-spec.js
+++ b/lib/shared/state-sync/threads-state-sync-spec.js
@@ -1,65 +1,83 @@
 // @flow
 
 import _isEqual from 'lodash/fp/isEqual.js';
+import { createSelector } from 'reselect';
 import t from 'tcomb';
 
 import type { StateSyncSpec } from './state-sync-spec.js';
+import type { AppState } from '../../types/redux-types.js';
 import {
   reportTypes,
   type ClientThreadInconsistencyReportCreationRequest,
 } from '../../types/report-types.js';
 import type { ProcessServerRequestAction } from '../../types/request-types.js';
 import {
   type RawThreadInfos,
   type RawThreadInfo,
   rawThreadInfoValidator,
 } from '../../types/thread-types.js';
 import { actionLogger } from '../../utils/action-logger.js';
 import { getConfig } from '../../utils/config.js';
 import { convertClientIDsToServerIDs } from '../../utils/conversion-utils.js';
+import { combineUnorderedHashes, values } from '../../utils/objects.js';
 import { generateReportID } from '../../utils/report-utils.js';
 import { sanitizeActionSecrets } from '../../utils/sanitization.js';
 import { ashoatKeyserverID, tID } from '../../utils/validation-utils.js';
 
 export const threadsStateSyncSpec: StateSyncSpec<
   RawThreadInfos,
   RawThreadInfo,
   $ReadOnlyArray<ClientThreadInconsistencyReportCreationRequest>,
 > = Object.freeze({
   hashKey: 'threadInfos',
   innerHashSpec: {
     hashKey: 'threadInfo',
     deleteKey: 'deleteThreadIDs',
     rawInfosKey: 'rawThreadInfos',
   },
   convertClientToServerInfos(infos: RawThreadInfos) {
     return convertClientIDsToServerIDs(
       ashoatKeyserverID,
       t.dict(tID, rawThreadInfoValidator),
       infos,
     );
   },
   findStoreInconsistencies(
     action: ProcessServerRequestAction,
     beforeStateCheck: RawThreadInfos,
     afterStateCheck: RawThreadInfos,
   ) {
     if (_isEqual(beforeStateCheck)(afterStateCheck)) {
       return emptyArray;
     }
     return [
       {
         type: reportTypes.THREAD_INCONSISTENCY,
         platformDetails: getConfig().platformDetails,
         beforeAction: beforeStateCheck,
         action: sanitizeActionSecrets(action),
         pushResult: afterStateCheck,
         lastActions: actionLogger.interestingActionSummaries,
         time: Date.now(),
         id: generateReportID(),
       },
     ];
   },
+  selector: createSelector(
+    (state: AppState) => state.integrityStore.threadHashes,
+    (state: AppState) =>
+      state.integrityStore.threadHashingStatus === 'completed',
+    (threadHashes, threadHashingComplete) => ({
+      ...threadsStateSyncSpec,
+      getInfoHash: id => threadHashes[`${ashoatKeyserverID}|${id}`],
+      getAllInfosHash: threadHashingComplete
+        ? () => combineUnorderedHashes(values(threadHashes))
+        : () => null,
+      getIDs: threadHashingComplete
+        ? () => Object.keys(threadHashes).map(id => id.split('|')[1])
+        : () => null,
+    }),
+  ),
 });
 
 const emptyArray = [];
diff --git a/lib/shared/state-sync/users-state-sync-spec.js b/lib/shared/state-sync/users-state-sync-spec.js
index 26d049da9..5e13df419 100644
--- a/lib/shared/state-sync/users-state-sync-spec.js
+++ b/lib/shared/state-sync/users-state-sync-spec.js
@@ -1,67 +1,80 @@
 // @flow
 
 import _isEqual from 'lodash/fp/isEqual.js';
+import { createSelector } from 'reselect';
 
 import type { StateSyncSpec } from './state-sync-spec.js';
+import type { AppState } from '../../types/redux-types';
 import {
   reportTypes,
   type UserInconsistencyReportCreationRequest,
 } from '../../types/report-types.js';
 import type { ProcessServerRequestAction } from '../../types/request-types.js';
 import {
   type UserInfo,
   type UserInfos,
   userInfosValidator,
 } from '../../types/user-types.js';
 import { actionLogger } from '../../utils/action-logger.js';
 import { getConfig } from '../../utils/config.js';
 import { convertClientIDsToServerIDs } from '../../utils/conversion-utils.js';
+import { combineUnorderedHashes, hash } from '../../utils/objects.js';
 import { generateReportID } from '../../utils/report-utils.js';
 import { sanitizeActionSecrets } from '../../utils/sanitization.js';
 import { ashoatKeyserverID } from '../../utils/validation-utils.js';
 
 export const usersStateSyncSpec: StateSyncSpec<
   UserInfos,
   UserInfo,
   $ReadOnlyArray<UserInconsistencyReportCreationRequest>,
 > = Object.freeze({
   hashKey: 'userInfos',
   innerHashSpec: {
     hashKey: 'userInfo',
     deleteKey: 'deleteUserInfoIDs',
     rawInfosKey: 'userInfos',
     additionalDeleteCondition(user: UserInfo) {
       return !user.username;
     },
   },
   convertClientToServerInfos(infos: UserInfos) {
     return convertClientIDsToServerIDs(
       ashoatKeyserverID,
       userInfosValidator,
       infos,
     );
   },
   findStoreInconsistencies(
     action: ProcessServerRequestAction,
     beforeStateCheck: UserInfos,
     afterStateCheck: UserInfos,
   ) {
     if (_isEqual(beforeStateCheck)(afterStateCheck)) {
       return emptyArray;
     }
     return [
       {
         type: reportTypes.USER_INCONSISTENCY,
         platformDetails: getConfig().platformDetails,
         action: sanitizeActionSecrets(action),
         beforeStateCheck,
         afterStateCheck,
         lastActions: actionLogger.interestingActionSummaries,
         time: Date.now(),
         id: generateReportID(),
       },
     ];
   },
+  selector: createSelector(
+    (state: AppState) => state.userStore.userInfos,
+    userInfos => ({
+      ...usersStateSyncSpec,
+      getInfoHash: id => hash(userInfos[id]),
+      getAllInfosHash: () =>
+        combineUnorderedHashes(Object.values(userInfos).map(hash)),
+      getIDs: () => Object.keys(userInfos),
+    }),
+  ),
 });
 
 const emptyArray = [];