Starting today, chats on LINE that have Letter Sealing (end-to-end encryption) enabled will now feature a padlock icon next to the chat's name. The changes may take a few days to come into effect.
Messages sent between users who have Letter Sealing enabled are stored on LINE's servers in an encrypted state and cannot be decrypted by anyone other than the users involved in the chat.
From its inception, LINE has maintained a strong commitment to protecting users' communication over LINE in compliance with applicable laws, with all data between users' devices and LINE's servers being encrypted. On September 8, 2015, LINE took that commitment one step further by introducing state-of-the-art, end-to-end encryption to 1-on-1 chats, followed by a rollout to group chats, voice calls, and video calls.
Now, in LINE 6.5.0, we've added a padlock icon to Letter Sealing-enabled chats.
How to use Letter Sealing
Letter Sealing is enabled by default.
We recommend that you keep Letter Sealing enabled at all times, but if you would like to disable it, please perform the following steps on the smartphone version of LINE.
1. Tap More (the "..." icon) > Settings (the gear icon) > Chats & Voice Calls.
2. Tap Letter Sealing.
Please note that the first time you attempt to send a message on the PC version of LINE with Letter Sealing enabled, you will be required to verify your LINE account via your smartphone as an initial security measure.
LINE will continue to take every measure possible to protect your privacy and strengthen the security of the LINE app.