On the security and composability of the one time pad

Authors:
Dominik Raub;Rainer Steinwandt;Jörn Müller-Quade
Affiliations:
IAKS, Arbeitsgruppe Systemsicherheit, Prof. Dr. Th. Beth, Fakultät für Informatik, Universität Karlsruhe (TH), Karlsruhe, Germany;IAKS, Arbeitsgruppe Systemsicherheit, Prof. Dr. Th. Beth, Fakultät für Informatik, Universität Karlsruhe (TH), Karlsruhe, Germany;IAKS, Arbeitsgruppe Systemsicherheit, Prof. Dr. Th. Beth, Fakultät für Informatik, Universität Karlsruhe (TH), Karlsruhe, Germany
Venue:
SOFSEM'05 Proceedings of the 31st international conference on Theory and Practice of Computer Science
Year:
2005

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Abstract

Motivated by a potentially flawed deployment of the one time pad in a recent quantum cryptographic application securing a bank transfer [1], we show how to implement a statistically secure system for message passing, that is, a channel with negligible failure rate secure against unbounded adversaries, using a one time pad based cryptosystem. We prove the security of our system in the framework put forward by Backes, Pfitzmann, and Waidner [2].