So when another new, shiny app made by some walled garden company shows app, bank should enforce that instead? My bank is using mobile signature(1) and I think it&#x27;s way superior to any app, because the encryption part is done inside SIM which has quite good security record. There&#x27;s simply no way I would trust Facebook (via WhatsApp) with my financial data.<p>1. <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Mobile_signature" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Mobile_signature</a>