A company wants to implement SSO for its cloud-based services to improve user experience and security. Which of the following technologies would best facilitate this?

Single Sign-On (SSO) is a user authentication service that permits a user to use one set of login credentials to access multiple applications. The service authenticates the end user for all the applications they have been given rights to and eliminates further prompts when the user switches applications during the same session.

To implement SSO for cloud-based services, the company can use the following technologies:

1. SAML (Security Assertion Markup Language): SAML is an open standard for exchanging authentication and authorization data between parties. It is widely used for implementing SSO in web browsers.

2. OAuth: OAuth is an open standard for access delegation, commonly used as a way for Internet users to grant websites or applications access to their information on other websites but without giving them the passwords.

3. OpenID Connect: OpenID Connect is a simple identity layer on top of the OAuth 2.0 protocol, which allows computing clients to verify the identity of an end-user based on the authentication performed by an authorization server.

4. JWT (JSON Web Token): JWT is a compact, URL-safe means of representing claims to be transferred between two parties. The claims in a JWT are encoded as a JSON object that is used as the payload of a JSON Web Signature (JWS) structure or as the plaintext of a JSON Web Encryption (JWE) structure, enabling the claims to be digitally signed or integrity protected with a Message Authentication Code (MAC) and/or encrypted.

The best technology to use would depend on the specific requirements of the company, such as the types of applications being used, the level of security required, and the existing infrastructure.