NewHope is a key-exchange protocol based on the Ring-Learning-with-Errors (Ring-LWE) problem.
NewHope512-CCA-KEM and NewHope1024-CCA-KEM are IND-CCA-secure key encapsulation mechanisms whichthat target level 1 and level 5, respectively, (matching or exceeding the brute-force security of AES-128 and AES-256, respectively).
Google is working on deploying post-quantum key-agreement in TLS by combining NewHope with an existing key-agreement (X25519)as the combination CECPQ1. Please find a GoLang implementation of NewHope in GitHub.