Green and blue bubbles finally encrypted. What changed for production?

Years of squabbling over green bubbles, iMessage, and "why do you have an Android" have finally led to a practical result: Apple and Google have implemented end-to-end encryption (E2EE) for cross-platform messages. The news is nice, but we at WIZICO see it not as a victory for users, but as an engineering problem that could go two different ways.

How it works and where the catch is

The gist is simple: iMessage and Google Messages now exchange encrypted messages via a protocol based on the Signal Protocol. According to The Register, technically this became possible thanks to unification of cryptographic keys and client updates. Sounds like a step into a bright future — but in practice we see a classic trade-off.

The problem is that end-to-end encryption in messengers isn't just about protection, but also about loss of control. For the average user, that's a plus. For a business that's used to analyzing conversations through corporate chats — it's not. If your client uses iMessage to talk to support, and you use Google Messages to reply, you won't be able to read the chat history if it isn't duplicated in the CRM. That's not a bug, it's a feature — but not everyone is ready for it.

Our angle: the engineering cost of E2EE

We've run into situations several times where a client demanded "end-to-end encryption" in a corporate messenger without realizing the consequences. For example, you can't search message history on the server — only on the client. You can't run a moderation bot that filters spam before delivery. You can't recover a conversation if a user loses their device. All of these aren't technical limitations, but fundamental properties of E2EE.

Apple and Google made this trade-off deliberately: they sacrifice corporate scenarios for user privacy. But for engineers designing systems, this is a signal: if your product relies on analyzing text messages (chatbots, sentiment analysis, compliance), then cross-platform encryption is not a gift, but a headache. You'll either have to move logic to the client (hard and expensive) or give up E2EE in your own channel.

What hasn't changed

It's important to understand: E2EE only works between Apple Messages and Google Messages. If your user is on Telegram, WhatsApp, or Signal — nothing has changed. Moreover, in group chats with participants on different platforms, encryption may not work at all if at least one client isn't updated. This is a typical "paper standard" that will take years to roll out.

We wouldn't recommend clients rely on this encryption as a security guarantee for integration. Without independent protocol audit, without a unified key registry — it's more of a marketing move by Apple and Google than an engineering-solid solution. But the direction is right: the world is moving toward "plain text" being encrypted by default, and that's good.

For us, as a team building communication systems, this means one thing: when designing new chats, we need to build in asymmetric client-side encryption from the start, rather than hoping the platform provider will do it for us. Otherwise, in two years we'll have to rewrite half the backend.