Linkable Democratic Group Signatures

@inproceedings{Manulis2006LinkableDG,
  title={Linkable Democratic Group Signatures},
  author={Mark Manulis and Ahmad-Reza Sadeghi and J{\"o}rg Schwenk},
  booktitle={IACR Cryptol. ePrint Arch.},
  year={2006}
}
In a variety of group-oriented applications cryptographic primitives like group signatures or ring signatures are valuable methods to achieve anonymity of group members. However, in their classical form, these schemes cannot be deployed for applications that simultaneously require (i) to avoid centralized management authority like group manager and (ii) the signer to be anonymous only against non-members while group members have rights to trace and identify the signer. The idea of recently… 
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