Efficient Stream Loss-tolerant Authentication (TESLA)

SRTP TESLA [RFC 4383] was designed to provide efficient data origin authentication for multicast and broadcast session.

This is needed since we do not want to create all possible pairwise authentications for the participants in a conference.

Slide Notes

M. Baugher and E. Carrara, “The Use of Timed Efficient Stream Loss-Tolerant Authentication (TESLA) in the Secure Real-time Transport Protocol (SRTP)”, IETF, RFC 4383, February 2006 http://www.rfc-editor.org/rfc/rfc4383.txt

Transcript

[slide365] In her licentiate thesis, Elisabetta also described something called the Efficient Stream Loss Tolerant Authentication, TESLA. And its approach is that when you have lots of people in a conference, how do you distribute the keys? And what happens when people leave the conference? Should they be able to still have access to the material that the others had because they had the key? Or is there a way that if they've left the conference, you can deny them access to that material? And you can read about it.