diff --git a/lib/utils/uuid.js b/lib/utils/uuid.js
--- a/lib/utils/uuid.js
+++ b/lib/utils/uuid.js
@@ -1,9 +1,28 @@
 // @flow
+import crypto from 'crypto';
 
 const uniqueBaseID = Date.now();
 let uuidCount = 0;
 function getUUID(): string {
   return `${uniqueBaseID}-${uuidCount++}`;
 }
+export const userUUIDTypes = Object.freeze({
+  KEYSERVER: 0,
+  WEB: 1,
+  MOBILE: 2,
+});
+export type UserUUIDType = $Values<typeof userUUIDTypes>;
 
-export { getUUID };
+function getUserUUID(type: UserUUIDType): string {
+  const uuidSuffix = crypto.randomBytes(32).toString('hex');
+  if (type === userUUIDTypes.KEYSERVER) {
+    return `ks-${uuidSuffix}`;
+  } else if (type === userUUIDTypes.WEB) {
+    return `web-${uuidSuffix}`;
+  } else if (type === userUUIDTypes.MOBILE) {
+    return `mobile-${uuidSuffix}`;
+  }
+  return '';
+}
+
+export { getUUID, getUserUUID };