| Messenger . | Send, reply, delete local . | Send, delete local, reply . | Send, reply, delete global . | Notification . |
|---|---|---|---|---|
| KakaoTalk | ● | ● | ● | None |
| Line | ○ | ○ | ○ | “Message unavailable” |
| Signal | ● | ● | – | “Original message not found” |
| Skype | – | – | ● | None |
| Telegram | ● | ○ | ● | None |
| Viber | ● | ● | ● | None |
| ● | ● | ● | None | |
| Wire | ○ | ○ | ○ | “You cannot see this message” |
| Messenger . | Send, reply, delete local . | Send, delete local, reply . | Send, reply, delete global . | Notification . |
|---|---|---|---|---|
| KakaoTalk | ● | ● | ● | None |
| Line | ○ | ○ | ○ | “Message unavailable” |
| Signal | ● | ● | – | “Original message not found” |
| Skype | – | – | ● | None |
| Telegram | ● | ○ | ● | None |
| Viber | ● | ● | ● | None |
| ● | ● | ● | None | |
| Wire | ○ | ○ | ○ | “You cannot see this message” |
Notes: We examined if quotations survive deleting the original message and if users are notified about the deletion.
Filled circle: original message visible; open circle: original message not visible. dash: scenario does not apply.
| Messenger . | Send, reply, delete local . | Send, delete local, reply . | Send, reply, delete global . | Notification . |
|---|---|---|---|---|
| KakaoTalk | ● | ● | ● | None |
| Line | ○ | ○ | ○ | “Message unavailable” |
| Signal | ● | ● | – | “Original message not found” |
| Skype | – | – | ● | None |
| Telegram | ● | ○ | ● | None |
| Viber | ● | ● | ● | None |
| ● | ● | ● | None | |
| Wire | ○ | ○ | ○ | “You cannot see this message” |
| Messenger . | Send, reply, delete local . | Send, delete local, reply . | Send, reply, delete global . | Notification . |
|---|---|---|---|---|
| KakaoTalk | ● | ● | ● | None |
| Line | ○ | ○ | ○ | “Message unavailable” |
| Signal | ● | ● | – | “Original message not found” |
| Skype | – | – | ● | None |
| Telegram | ● | ○ | ● | None |
| Viber | ● | ● | ● | None |
| ● | ● | ● | None | |
| Wire | ○ | ○ | ○ | “You cannot see this message” |
Notes: We examined if quotations survive deleting the original message and if users are notified about the deletion.
Filled circle: original message visible; open circle: original message not visible. dash: scenario does not apply.
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