RISC Seminar

Generalizing Needham-Schroeder-Lowe for Multi-Party Authentication

Speaker: Sjouke Mauw (TU Eindhoven)

Date/Time: Thursday 09.03.06, 14.30 h

Location: Room N328, NIKHEF (next to CWI)

Abstract:
We propose a protocol for multi-party authentication for any number of parties, which generalizes the well-known Needham-Schroeder-Lowe protocol. We argue that the protocol provides authentication of the communicating parties (by proving injective synchronisation) and secrecy of the generated challenges. For p parties, the protocol consists of 2p-1 messages, which we show to be the minimal number of messages required to achieve the desired security properties in the presence of a Dolev-Yao style intruder. The underlying communication structure of the generalized protocol can serve as the backbone of a range of authentication protocols.

(joint work with Cas Cremers)

Speaker:	Sjouke Mauw (TU Eindhoven)
Date/Time:	Thursday 09.03.06, 14.30 h
Location:	Room N328, NIKHEF (next to CWI)
Abstract:	We propose a protocol for multi-party authentication for any number of parties, which generalizes the well-known Needham-Schroeder-Lowe protocol. We argue that the protocol provides authentication of the communicating parties (by proving injective synchronisation) and secrecy of the generated challenges. For p parties, the protocol consists of 2p-1 messages, which we show to be the minimal number of messages required to achieve the desired security properties in the presence of a Dolev-Yao style intruder. The underlying communication structure of the generalized protocol can serve as the backbone of a range of authentication protocols. (joint work with Cas Cremers)