It's the most short-lived expiration policy. When you create a paste
set to expire on "burn after reading" it will be automatically deleted
as soon as someone first opens it.
Is it possible to undelete a paste set to "burn after reading"
after it's first seen?
No. Once as paste has been removed there's no way of bringing it back.
How does encryption work?
Before submitting the paste to our servers, the encryption key is used to apply
to all fields. The output from AES is then converted to text using Base64 encoding, and
that is uploaded to our servers.
What algorithms are used for encrypting pastes?
AES-128 in CBC mode and PKCS#7.
I forgot the encryption key, can you help me recover it?
We cannot. The encryption key is never sent to our servers and the
encryption/decryption processes happen on the device you are using. If
an encryption key is lost, it will never be possible to recover any
pastes it was used on.