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What are cryptographic techniques that could be used so that if I wanna to enable a server to send message to certain nodes in a network with preserving the privacy location for them ??

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  • $\begingroup$ well you seem to think it can be done by elliptic curves and/or secret sharing and / or zero knowledge. could you share your thoughts and make a better stated question? $\endgroup$
    – kodlu
    Sep 1, 2018 at 14:02
  • $\begingroup$ Well... If Google for "privacy preserving location", you wil get a ton to read... $\endgroup$ Sep 1, 2018 at 22:34
  • $\begingroup$ What kind of "certain" condition are you interested in? An interactive proof exists to verify that distance is less than (or more than) some known radius. Is interaction with nodes allowed? $\endgroup$ Sep 2, 2018 at 8:11

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