On the Practical and Security Issues of Batch Content Distribution Via Network Coding

— File distribution via network coding has received a lot of attention lately. However, direct application of network coding may have security problems. In particular, attackers can inject “faked” packets into the file distribution process to slow down the information dispersal or even deplete the network resource. Therefore, content verification is an important and practical issue when network coding is employed. When network coding is used, it is infeasible for the source of the content to provide all the hash values or signatures required for verification, and hence the traditional “hash-and-sign” methods are no longer applicable. Recently, a new on-the-fly verification technique is proposed by Krohn et al. for rateless erasure codes [1]. However, their scheme requires a large number of hash values to be distributed in advance, and all of them are needed to verify even for a single packet. We propose a new batch delivery and verification scheme that is similar to the...

• Type: Conference
• Year: 2006
• Where: ICNP
• Authors: Qiming Li, Dah-Ming Chiu, John C. S. Lui
• Keywords: Hash Values, ICNP 2006, Linear Network Coding, Network Coding, Network Protocols