Explore the future of online security in this JSConf Korea 2020 conference talk. Delve into the Web Authentication API (WebAuthn) and its potential to revolutionize user identification. Learn about the vulnerabilities of traditional password-based systems and the advantages of public key cryptography. Discover how WebAuthn, supported by modern browsers, can create a more secure user experience. Gain insights into the implementation of passwordless authentication, including biometrics and multifactor methods. Understand the technical aspects of WebAuthn through practical examples and get methods. Equip yourself with knowledge to enhance online security and bid farewell to conventional password systems.