How to Enable Facebook Secret Conversations
Before you can send encrypted messages, make sure the Facebook Secret Conversations option is turned on.
How to Start a Secret Conversation in Facebook Messenger
Follow these steps when you want to send a secret message on Facebook Messenger:
How to Verify Facebook Secret Conversations
All Facebook secret conversations are encrypted. Facebook also gives you the option to verify the end-to-end encryption by comparing device keys. Both parties in the conversation will receive device keys, which you can compare to ensure they match. To view a conversation’s device key in Android or iOS:
How to Delete Secret Facebook Messenger Conversations
You can delete Facebook secret conversations on your devices, but you can’t delete secret conversations on your recipient’s device.
Access Secret Conversations on Multiple Devices
You can only access a secret conversation on the device the you created it on. You can send secret conversations from another device, but you won’t be able to see any previous messages. When you sign in to Messenger on a new device, you won’t see the messages from previous secret conversations. You’ll receive a notification in past secret conversations letting you, and the other participant know you’re on a new device. Once the device is added, you’ll see new messages in secret conversations on all active devices.