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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)...
We propose a Reed-Solomon (RS) code construction of the 1-out-n (ring) signature scheme. It is obtained from the observation of the equivalency between the erasure correction technique of the RS code and the polynomial interpolation. The structure is very simple and yields a ring equation that can appropriately denoted by Z1 + ... + Zn=v, which represents...
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