New generation of safe messaging: “Letter Sealing” « LINE Engineers' Blog

Android users that have Letter Sealing enabled in settings or have it on by default can benefit from the security of Letter Sealing when sharing text messages, location information in a one-on-one conversation with another user. One caveat is that the other user must have also opted in to Letter Sealing in order for it to work. So keep in mind that you will need to convince other users to opt in if you wish to to enjoy the security of Letter Sealing when you are talking with them. We plan to implement Letter Sealing into more types of messages and group chats as well. Keep posted to the blog for more information on new security features for LINE.