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Header Hopping and Packet Mixers
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Mathematics and Computer Science, Department of Information Technology.
2000 (English)In: The 9th IEEE International Conference on Computer Communications and Networks, 2000Conference paper, Published paper (Other (popular scientific, debate etc.))
Abstract [en]

We describe a steganographic protocol for packet switched networks that is based on the dynamic rewriting of packet headers. The protocol provides confidentiality without encryption based on Rivest's ``chaffing and winnowing'' technique. We identify new places in computer networks where this method can be applied and describe an alternate chaffing method that relies on unpredictable number sequences rather than the use of message authentication codes. Our approach requires far less chaffing bandwidth overhead; Moreover, thanks to the underlying active network, we can place packet stream repeaters and filters on intermediate (and untrusted) nodes. Header hopping is closely related to frequency hopping in wireless communications; we also link it to Chaum's work on anonymous routing.

Place, publisher, year, edition, pages
2000.
Identifiers
URN: urn:nbn:se:uu:diva-79227OAI: oai:DiVA.org:uu-79227DiVA: diva2:107140
Available from: 2006-04-05 Created: 2006-04-05

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