Oiwa, Y., Watanabe, H., Takagi, H., Maeda, K., Hayashi, T., and Y. Ioku, "Mutual Authentication Protocol for HTTP: Cryptographic Algorithms Based on the Key Agreement Mechanism 3 (KAM3)", RFC 8121, DOI 10.17487/RFC8121, April 2017, <https://www.rfc-editor.org/info/rfc8121>.