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Upcoming update to OPTN website

Published on: Monday, October 5, 2020

Beginning Oct. 15, requests to access using the transport layer security (TLS) 1.1 encryption algorithm will not be accepted. TLS 1.1 is an outdated encryption algorithm, and some of its components are deprecated.

Please be aware of the change and plan to use a browser that supports TLS 1.2 to ensure continued access to after Oct. 15. A list of popular browsers that support TLS 1.2 is provided below. Please make sure that you are using a version of the below-listed browsers or higher before Oct. 15.

  • Android 4.4.2
  • Chrome 30
  • Edge 12
  • Firefox 27
  • Internet Explorer 11
  • Safari 7

If you have questions, please contact UNOS Customer Service at or call 800-978-4334 from 8 a.m. to 7 p.m. EDT.