LINE

Chat Security

Possibility of messages being viewed by third parties toggle
As messages sent in chats are covered by the law governing privacy of communications, no LINE employee or third party, besides the chat participants themselves, will be able to view them. LINE treats the chat history and other information of its users as important personal information, and handles them with the maximum level of security possible.

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Preventing messages from strangers toggle
To avoid messages from strangers, please refer to the measures below.

To reject users besides your friends from messaging you
1. Tap the settings icon > Privacy.
2. Turn ON Filter Messages.

If you receive messages from strangers on LINE, please block them by following the steps below.

1. Open the chat sent by the user and tap the V icon at the top right.
2. Tap Block.

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Blocking LINE GAME messages toggle
To block messages from LINE GAME apps, please follow the steps below.

1. Tap the settings icon > Notifications > Authorized Apps.
2. Tap the app you do not want to receive notifications for.
3. Turn OFF Receive Messages or Receive Notifications.

You will no longer receive messages from the app by turning OFF Receive Messages; however you will still receive gifts awarded to you from friends. 

By turning OFF Receive Notification, you will still receive LINE chat messages; however you will not receive notifications for them.

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What is Letter Sealing? toggle
Letter Sealing is a feature that provides End-to-end encryption (E2EE) for chat room messages. E2EE is a communication system designed so that messages saved on our servers are encrypted and cannot be read by anyone except the sender and receiver of the message.

You will be able to read your chat messages as usual, but with added security if both the sender and receiver have turned on Letter Sealing.

If you use the PC version of LINE (Windows and Mac OS) or the iPad version after turning on Letter Sealing for the first time, you will be required to verify your identity on the smartphone version of LINE with a 6 digit verification number.

Letter Sealing can only be used on LINE versions 5.3.0 or later. If you are using a version earlier than 5.3.0, please update the app from here.

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