BLIP's security isn't magic. It's verifiable math and transparent technology.
The moment you create a chat room, a disposable encryption key is generated in your browser. This key is never sent to the server.
Every message is encrypted on your device before transmission. The server sees nothing but encrypted ciphertext.
Transmitted data resides briefly in RAM (volatile memory) and is deleted immediately upon delivery. Since it's never written to disk, recovery is physically impossible.