Lucas is looking for an XML-based open standard for exchanging authentication information. Which of the following would best meet his needs?

Security Assertion Markup Language (SAML) is an XML-based, open standard format for exchanging authentication and authorization data between parties. OAuth allows an end user’s account information to be used by third-party services, without exposing the user’s password. RADIUS is a remote access protocol. New Technology LAN Manager (NTLM) is not XML- based.