Messages are heavily encrypted with 2048 bit RSA right in your browser. Even the NSA would not be able to access them. Our source code open and you can check it.
We use P2P connection, so your messages are not stored anywhere and removed immediately after the closing of tabs. Everything works right in your browser and we don't send any data to the server.
You can start using SecretChat right now, we do not need any information about you. For better anonymity you can use our service through TOR.