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At the moment ring signatures are more eficient than zk-SNARKS, but as fluffypony already comment, probably any cryptocurrencie in the future will use this technology. Can monero implement zk-SNARKS in the future if needed? How can it be done?

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  • Can you link to the fluffypony comment you cited (clarifying "efficient") if it is a necessary component of your question? Nov 8, 2016 at 5:27

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Riccardo has mentioned that zk-SNARKs could be used in temporary sidechains. There is no official plan laid out yet to my knowledge.

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  • Did he mention zk-SNARKs or zk-STARKs (no trusted setup)?
    – neversleep
    Feb 23, 2018 at 5:09
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Why? I don't think it make sense to do with the main chain at all.

I could be wrong but I think to begin those types of ‘shielded’ transactions you first have to perform a type of trusted setup where a key becomes split into shards. This seems silly to me...even if they find a way to do it without an initial trusted key; it seems pointless for Monero at the moment where its own privacy methods seem adequate.

In the future... maybe ... but, again, why?

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