DiffSig: Differentiated Digital Signature for Real-Time Multicast Packet Flows

摘要

We are studying toward several goals necessary to apply digital signature to value-added real time contents to multicast over an insecure and unreliable channel. In this paper we propose a new digital signature framework, called DiffSig, through the first trying to categorize security services that can be achieved by digital signature. DiffSig is able to support equivalent security with smaller key sizes, which results in faster computations and lower transmission overhead. In addition, DiffSig allows a participant to join or leave the communication dynamically.