Key fingerprints are unique encryption keys that Letter Sealing gives to each user so they can send messages to one another safely and securely.
Note: The actual keys are kept secret and will not appear in LINE chats.
If your key fingerprint matches your friend's, it means your chat is securely encrypted. To check whether your key fingerprints match, follow the steps below.
Note: Key fingerprint confirmation is optional.
1. Tap the menu icon at the top of a chat screen.
2. Tap This chat is protected with Letter Sealing at the bottom of the screen.
3. Compare the key fingerprints on your device and your friend's device.
Note: To compare key fingerprints with your friend, we recommend meeting face-to-face or using a form of communication you trust.
If "This chat is protected with Letter Sealing" doesn't appear, it means Letter Sealing is turned OFF. To turn Letter Sealing ON, follow the steps in this Help article
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