Transport Layer Security (TLS) Renegotiation Indication Extension

Document Type Replaced Internet-Draft (individual)
Last updated 2009-12-17 (latest revision 2009-11-17)
Replaced by draft-ietf-tls-renegotiation
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Intended RFC status (None)
Expired & archived
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IESG IESG state Replaced by draft-ietf-tls-renegotiation
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


SSL and TLS renegotiation are vulnerable to an attack in which the attacker forms a TLS connection with the target server, injects content of his choice, and then splices in a new TLS connection from a client. The server treats the client's initial TLS handshake as a renegotiation and thus believes that the initial data transmitted by the attacker is from the same entity as the subsequent client data. This draft defines a TLS extension to cryptographically tie renegotiations to the TLS connections they are being performed over, thus preventing this attack.


Eric Rescorla (
Marsh Ray (
Steve Dispensa (
One Way (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)