diff --git a/keyserver/src/creators/account-creator.js b/keyserver/src/creators/account-creator.js
--- a/keyserver/src/creators/account-creator.js
+++ b/keyserver/src/creators/account-creator.js
@@ -71,7 +71,7 @@
     WHERE LCASE(username) = LCASE(${request.username})
   `;
   const promises = [dbQuery(usernameQuery)];
-  const { calendarQuery } = request;
+  const { calendarQuery, publicKey, socialProof } = request;
   if (calendarQuery) {
     promises.push(verifyCalendarQueryThreadIDs(calendarQuery));
   }
@@ -103,6 +103,8 @@
     createNewUserCookie(id, {
       platformDetails: request.platformDetails,
       deviceToken,
+      publicKey,
+      socialProof,
     }),
     deleteCookie(viewer.cookieID),
     dbQuery(newUserQuery),
diff --git a/keyserver/src/responders/user-responders.js b/keyserver/src/responders/user-responders.js
--- a/keyserver/src/responders/user-responders.js
+++ b/keyserver/src/responders/user-responders.js
@@ -201,7 +201,7 @@
   const calendarQuery = request.calendarQuery
     ? normalizeCalendarQuery(request.calendarQuery)
     : null;
-
+  const { publicKey, socialProof } = request;
   const newServerTime = Date.now();
   const deviceToken = request.deviceTokenUpdateRequest
     ? request.deviceTokenUpdateRequest.deviceToken
@@ -210,6 +210,8 @@
     createNewUserCookie(userId, {
       platformDetails: request.platformDetails,
       deviceToken,
+      publicKey,
+      socialProof,
     }),
     deleteCookie(viewer.cookieID),
   ]);
diff --git a/keyserver/src/session/cookies.js b/keyserver/src/session/cookies.js
--- a/keyserver/src/session/cookies.js
+++ b/keyserver/src/session/cookies.js
@@ -644,6 +644,8 @@
 type UserCookieCreationParams = {
   platformDetails: PlatformDetails,
   deviceToken?: ?string,
+  publicKey?: ?string,
+  socialProof?: ?string,
 };
 
 // The result of this function should never be passed directly to the Viewer
@@ -657,7 +659,7 @@
   userID: string,
   params: UserCookieCreationParams,
 ): Promise<UserViewerData> {
-  const { platformDetails, deviceToken } = params;
+  const { platformDetails, deviceToken, publicKey, socialProof } = params;
   const { platform, ...versions } = platformDetails || defaultPlatformDetails;
   const versionsString =
     Object.keys(versions).length > 0 ? JSON.stringify(versions) : null;
@@ -679,10 +681,12 @@
     time,
     deviceToken,
     versionsString,
+    publicKey,
+    socialProof,
   ];
   const query = SQL`
     INSERT INTO cookies(id, hash, user, platform, creation_time, last_used,
-      device_token, versions)
+      device_token, versions, public_key, social_proof)
     VALUES ${[cookieRow]}
   `;
   await dbQuery(query);
diff --git a/lib/types/account-types.js b/lib/types/account-types.js
--- a/lib/types/account-types.js
+++ b/lib/types/account-types.js
@@ -51,6 +51,8 @@
   +deviceTokenUpdateRequest?: ?DeviceTokenUpdateRequest,
   +platformDetails: PlatformDetails,
   +address?: ?string,
+  +publicKey?: ?string,
+  +socialProof?: ?string,
 };
 
 export type RegisterResponse = {
@@ -116,6 +118,8 @@
   +platformDetails: PlatformDetails,
   +watchedIDs: $ReadOnlyArray<string>,
   +source?: LogInActionSource,
+  +publicKey?: ?string,
+  +socialProof?: ?string,
 };
 
 export type LogInResponse = {
@@ -149,12 +153,16 @@
   +deviceTokenUpdateRequest?: ?DeviceTokenUpdateRequest,
   +platformDetails: PlatformDetails,
   +watchedIDs: $ReadOnlyArray<string>,
+  +publicKey?: ?string,
+  +socialProof?: ?string,
 };
 
 export type SIWEServerCall = {
-  +address: string,
-  +message: string,
-  +signature: string,
+  address: string,
+  message: string,
+  signature: string,
+  publicKey: string,
+  socialProof: string,
   ...LogInExtraInfo,
 };
 
diff --git a/native/account/siwe-panel.react.js b/native/account/siwe-panel.react.js
--- a/native/account/siwe-panel.react.js
+++ b/native/account/siwe-panel.react.js
@@ -16,11 +16,11 @@
   type DispatchActionPromise,
 } from 'lib/utils/action-utils';
 
+import { commCoreModule } from '../native-modules';
 import { NavContext } from '../navigation/navigation-context';
 import { useSelector } from '../redux/redux-utils';
 import { nativeLogInExtraInfoSelector } from '../selectors/account-selectors';
 import { defaultLandingURLPrefix } from '../utils/url-utils';
-
 const commSIWE = `${defaultLandingURLPrefix}/siwe`;
 
 type BaseProps = {
@@ -43,15 +43,18 @@
   siweAction,
 }: Props) {
   const handleSIWE = React.useCallback(
-    ({ address, message, signature }) => {
-      // this is all mocked from register-panel
+    async ({ address, message, signature }) => {
       const extraInfo = logInExtraInfo();
+      await commCoreModule.initializeCryptoAccount(address);
+      const { ed25519 } = await commCoreModule.getUserPublicKey();
       dispatchActionPromise(
         siweActionTypes,
         siweAction({
           address,
           message,
           signature,
+          publicKey: ed25519,
+          socialProof: signature,
           ...extraInfo,
         }),
         undefined,
diff --git a/native/schema/CommCoreModuleSchema.js b/native/schema/CommCoreModuleSchema.js
--- a/native/schema/CommCoreModuleSchema.js
+++ b/native/schema/CommCoreModuleSchema.js
@@ -18,6 +18,10 @@
   +key: string,
   +text: string,
 };
+type ClientPublicKeys = {
+  +curve25519: string,
+  +ed25519: string,
+};
 
 export interface Spec extends TurboModule {
   +getDraft: (key: string) => Promise<string>;
@@ -42,7 +46,7 @@
     operations: $ReadOnlyArray<ClientDBThreadStoreOperation>,
   ) => void;
   +initializeCryptoAccount: (userId: string) => Promise<string>;
-  +getUserPublicKey: () => Promise<string>;
+  +getUserPublicKey: () => Promise<ClientPublicKeys>;
   +getUserOneTimeKeys: () => Promise<string>;
   +openSocket: (endpoint: string) => Object;
   +getCodeVersion: () => number;