Third Party

Full Title or Meme

An Entity that is brought into a online session after the first party and second party establish that session.

Context

• The original user of a third party was a server that was contacted by the first party server based on the interaction with the client (user in this case.)
• The most common use of the term now is an Identity Provider or Advertiser that is contacted by the first party web server.

Problems

• Third party applications, like Single Sign-On relying on third party cookies, which will be blocked in all browser by sometime in 2025. If you want to test how this will look see this page.
• The Federated Credential Management (FedCM) API is designed to support Single Sign-On using OpenID Connect and similar protocols when Third Party Cookies are not supported.

Solutions

• Most browser manufaturers had either agreed to or out-right eliminated use of Third Party Cookies by the end of 2024. But Google, whose primary source of revenue in dependent on ads, backed off on 2024-07-22 and said they were working on an alternate that allowed user privacy as well as Third Party Cookies. The advertising industry can heave a sigh of relief.
• Third Party Cookies Must Be Removed 2024-07-24 from the W3C TAG