The PQXDH protocol was developed by Ehren Kret and Rolfe Schmidt as an extension of the X3DH protocol [6] by Moxie Marlinspike and Trevor Perrin. Thanks to Trevor Perrin for discussions on the design of this protocol.
Thanks to Bas Westerbaan, Charlie Jacomme, Chris Peikert, Daniel Collins, Deirdre Connolly, Franziskus Kiefer, John Schanck, Jon Millican, Jordan Rose, Karthik Bhargavan, Loïs Huguenin-Dumittan, Peter Schwabe, Rune Fiedler, Shuichi Katsumata, Sofía Celi, Théophile Wallez, Tomas Duchac, and Yo'av Rieck for helpful discussions and editorial feedback.
Thanks to the Kyber team [21] for their work on the Kyber key encapsulation mechanism.