In cryptography, CECPQ1 is a post-quantum cipher developed by Google to make web browsers secure via Transport Layer Security (TLS).
Details
CECPQ1 was designed to provide confidentiality even against an attacker who possesses a large quantum computer. It is a key-agreement algorithm plugged into TLS that combines X25519 and New Hope, a ring learning with errors primitive. Even if New Hope turns out to be breakable, the X25519 key-agreement will ensure that it provides at least the security of our existing connections.
It is available in Google Chrome 54 beta. In 2016, the experimental use in Chrome ended and it was planned to disable CECPQ1 in a later Chrome update.
References
CECPQ1 Wikipedia(Text) CC BY-SA