We’re pleased to announce the PSQ protocol for establishing a hybrid post-quantum shared secret between two parties. Cryptographic protocols, which exclusively rely on classical public key cryptography for establishing shared secrets, may be vulnerable to harvest-now-decrypt-later (HNDL) quantum attacks. However, many protocols in widespread use today allow injecting a previously established pre-shared key (PSK) into the computation of the shared secret. If we can establish this pre-shared key in a way that is secure against HNDL attackers, we can provide an easy way of protecting many applications without having to touch their internals.