Abstract
In this paper, we present new attacks on the redactable signature scheme introduced by Kundu and Bertino at VLDB ’08. This extends the work done by Brzuska et al. at ACNS ’10 and Samelin et al. at ISPEC ’12. The attacks address unforgeability, transparency and privacy. Based on the ideas of Kundu and Bertino, we introduce a new provably secure construction. The corresponding security model is more flexible than the one introduced by Brzuska et al. Moreover, we have implemented the schemes introduced by Brzuska et al. and Kundu and Bertino. The practical evaluation shows that schemes with a quadratic complexity become unuseable very fast.
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Samelin, K., Pöhls, H.C., Bilzhause, A., Posegga, J., de Meer, H. (2012). On Structural Signatures for Tree Data Structures. In: Bao, F., Samarati, P., Zhou, J. (eds) Applied Cryptography and Network Security. ACNS 2012. Lecture Notes in Computer Science, vol 7341. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31284-7_11
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DOI: https://doi.org/10.1007/978-3-642-31284-7_11
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