A proxy signature enables the original signer to delegate her signing capability to a proxy entity, who signs a message on behalf of the original signer. In this paper, we discuss the necessity of a secure channel in proxy signatures. Though establishing a secure channel has much influence on the efficiency of the scheme, to the best of our knowledge, this topic has not been discussed before. All known proxy signatures used a secure channel to deliver a signed warrant except one which used a 3-pass weak blind signature. However, the KPW scheme [2] appeared to be secure without the secure channel. We think that our result can contribute to designing more efficient proxy signature scheme. © Springer-Verlag Berlin Heidelberg 2003.
CITATION STYLE
Lee, J. Y., Cheon, J. H., & Kim, S. (2003). An analysis of proxy signatures: Is a secure channel necessary? Lecture Notes in Computer Science (Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2612, 68–79. https://doi.org/10.1007/3-540-36563-x_5
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