Transport Layer Security Channel ID

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Transport Layer Security Channel ID (TLS Channel ID, previously known as Transport Layer Security – Origin Bound Certificates TLS-OBC)[1] is a draft RFC proposal[2][3] Transport Layer Security (TLS) extension that aims to increase TLS security by using certificates on both ends of the TLS connection. Notably, the client is permitted to dynamically create a local, self-signed certificate that provides additional security.

It can also protect users from the related domain cookie attack.[4][5]

Token Binding[edit]

Token Binding is an evolution of the TLS Channel ID feature,[6] and the IETF draft has Microsoft and Google as authors.[7]


  1. ^ TLS-OBC RFC
  2. ^ TLS Channel ID RFC
  3. ^ Dietz, Michael; Czeskis, Alexei; Balfanz, Dirk; Wallach, Dan (August 8–10, 2012). "Origin-Bound Certificates: A Fresh Approach to Strong Client Authentication for the Web" (PDF). Proceedings of the 21st USENIX Security Symposium.
  4. ^ "Related Domain Cookie Attack"[unreliable source?]
  5. ^ additional info is available here[unreliable source?]
  6. ^ "Google Chrome Privacy Whitepaper". Google Inc.
  7. ^ A. Popov, Ed., M. Nystroem, Microsoft, D. Balfanz, A. Langley, Google (2016-01-08). "The Token Binding Protocol Version 1.0".CS1 maint: Multiple names: authors list (link)

External links[edit]