Spontaneous anonymous group (SAG) cryptography is a fundamental alternative to achieve thresholding without group secret or setup. It has gained wide interests in applications to ad hoc groups. We present a general construction of blind SAG 1-out-of-n and t-out-of-n signature schemes from essentially any major blind signature. In the case when our scheme is built from blind Schnorr (resp. Okamoto-Schnorr) signature, the parallel one-more unforgeability is reduced to Schnorr's ROS Problem in the random oracle model plus the generic group model. In the process of our derivations, we obtain a generalization of Schnorr's result from single public key to multiple public keys. © Springer-Verlag Berlin Heidelberg 2005.
CITATION STYLE
Chan, T. K., Fung, K., Liu, J. K., & Wei, V. K. (2005). Blind spontaneous anonymous group signatures for ad hoc groups. In Lecture Notes in Computer Science (Vol. 3313, pp. 82–94). Springer Verlag. https://doi.org/10.1007/978-3-540-30496-8_8
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