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I have been doing some research in group and ring signature literature. I am trying to find a ring/group signature which provide the following propriety:

  • Anonymity for the signer
  • Verifiable by a group manager
  • Signer in the group should be able to create the signature on their own
  • The construction should be based on elliptic curve

I have checked the AOS ring signature, which are almost what I need but unfortunately I didn't find a way to add a group manager or something like that. Are AOS signature modifiable with a group manager ? Otherwise is there a scheme/research which has those proprieties?

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    $\begingroup$ Would you clarify "list item"? Or is that just the template that SE provided you? Is a "pure" ring signature enough; i.e., is spontaneous group forming allowed, and can it be verifiable by people outside the group? $\endgroup$ – Ruben De Smet Apr 3 '18 at 19:34
  • $\begingroup$ The SE added 'List item', I'm not sure about its meaning. Pure ring signature are good (anonymous, spontaneous and verifiable) but they miss the fact that a third party can find out who is the real signer in the group. $\endgroup$ – fraccaman Apr 3 '18 at 19:47
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    $\begingroup$ Okay, please remove "List item" from your post then (edit your post). "find out who is the real signer in the group", you want to be able to leak/reveal the signer? $\endgroup$ – Ruben De Smet Apr 4 '18 at 6:41
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    $\begingroup$ @RubenDeSmet Feel free to remove "List item" yourself next time. It is added if you create an empty list or a list with an empty bullet. Note that there is an additional question in the above comment, fraccaman. $\endgroup$ – Maarten Bodewes Apr 4 '18 at 10:59
  • $\begingroup$ What exactly is wrong with the AOS-signature? It allows each member of a group to sign a message on it's own without revealing it's identity. $\endgroup$ – VincBreaker Apr 4 '18 at 14:20

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