Computer Science – Cryptography and Security
Scientific paper
2008-07-03
Computer Science
Cryptography and Security
Proc. of the IEEE International Conference on Communications (ICC 2008), Beijing, China, May 2008
Scientific paper
Under the emerging network coding paradigm, intermediate nodes in the network are allowed not only to store and forward packets but also to process and mix different data flows. We propose a low-complexity cryptographic scheme that exploits the inherent security provided by random linear network coding and offers the advantage of reduced overhead in comparison to traditional end-to-end encryption of the entire data. Confidentiality is achieved by protecting (or "locking") the source coefficients required to decode the encoded data, without preventing intermediate nodes from running their standard network coding operations. Our scheme can be easily combined with existing techniques that counter active attacks.
Barros João
Lima Luísa
Vilela João P.
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