How do I know if a safety number has been marked as verified?Ī checkmark will appear in the chat header by your contact's name when the safety number is marked as verified. View the safety number and tap the Mark as Verified or tap Clear Verification button. How do I manage the verified status of the safety number? You can also visually or audibly compare the numeric code, or use the share icon to copy it to your clipboard. If the safety number is identical then you can be sure that you are communicating with the right person. The easiest way to compare safety numbers is to scan your contact's QR code while viewing their safety number. How do I verify the safety number with my contact?

Tap on the chat header or chat settings.

Note: This is only created after you've accepted a message request. So, messages that were sent before the safety number change are using the old locks and will not be delivered. When the safety number changes it's as if you have changed the locks and keys for your messages. Your messages with Signal are end-to-end encrypted which is like having locks and keys for each message. Undelivered messages will not be resent after a safety number has changed. Why was my message before the safety number change alert not delivered? However, if a safety number changes frequently or unexpectedly it may be a sign that something is wrong. The most common scenarios where a safety number advisory is displayed are when a contact switches to a new phone or re-installs Signal, but these actions don't always result in a safety number change.

This allows users to check the privacy of their communication with a contact and helps protect against any attempted man-in-the-middle attacks.

Signal advises you whenever a safety number has changed. Why do I see a safety number change alert? If a safety number has been marked as verified, any change must be manually approved before sending a new message. Verification of safety numbers is a good security practice for sensitive communication. Each Signal one-to-one chat has a unique safety number that allows you to verify the security of your messages and calls with specific contacts.

Signal security