When you message someone who also has chat features enabled in Messages, your chat conversations automatically upgrade to end-to-end encryption. With end-to-end encryption, no one can read the content sent between you and the other person.
Check if a conversation is end-to-end encrypted
End-to-end encrypted conversations have:
- A banner that says “ Chatting with [contact name or phone number].”
- A lock next to message timestamps.
- A lock on the send button when you compose a message.
If messages don’t have locks, make sure you and the person you message both have:
Your conversation is end-to-end encrypted with a secret key that only you and your contact can access. You can verify end-to-end encryption by asking your contact if they have the same code.
- Open the Messages app .
- Open a conversation or create a new message.
- In the top right of the conversation window, tap More options Details Verify encryption.
- You can call your contact and read your verification code aloud to make sure your codes match.
- It's optional to confirm a verification code. Messages will be end-to-end encrypted even if you don’t take this step.
- End-to-end encryption may not work on certain Android Go phones.
- End-to-end encrypted messages only work when you communicate with another Messages user. If you or your contact change messaging apps or operating software, Messages may not immediately detect when a conversation is no longer eligible for end-to-end encryption. Initially, some messages may not appear or they may be delivered in an unreadable, encrypted format.
If you get an unreadable, encrypted message:
- Update your app to the latest version of Messages.
- If your device came with the Carrier Services app installed, update to the latest version of the app.
- Ask your contact to resend the message.
If you changed messaging apps and aren't receiving messages, you may need to turn chat features off.