In a bid to improve messaging security, Google has announced that the Key Verifier function will be coming to Android. This function will ensure that contact credentials are legitimate.
Scam messages can be received a number of ways, but can even originate from usually secure contacts on your device due to tricks like spoofing, compromised accounts, and even SIM swap attacks. While end-to-end encryption helps reduce certain risks, it is not foolproof in all scenarios.
Key Verifier is designed to enhance the security of your private conversations in Google Messages by allowing you and your contacts to confirm each other’s identities. This process leverages the existing end-to-end encryption by utilizing unique public and private encryption keys generated by your devices. The core of the solution lies within the Google Contacts app, where you’ll find options to verify a contact’s public key. This verification can be conveniently done either by scanning a QR code displayed on your contact’s device or by comparing a unique verification number shown on both screens.
Once the verification process is complete, Google Messages will provide a clear visual confirmation, such as a checkmark, indicating that the encryption keys have been successfully matched. This visual cue offers immediate reassurance that you are communicating with the individual you expect. In essence, it’s an extra handshake to ensure your messaging is as secure as it can possibly be.
Furthermore, Key Verifier acts as a safeguard against potential impersonation attempts. For instance, if a malicious actor manages to gain control of your friend’s phone number and uses it on a different device, the verification status for that contact in your Google Contacts will be marked as no longer verified. This change serves as a crucial warning, suggesting that your friend’s account may be compromised or that the current message sender is not who they appear to be.
Google is making Key Verifier available for all Android devices running Android 10 or higher and will launch “later this summer.”
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