How does RingCT prevent doublespend ?

Question

For what I know about RingCT it use fake outputs to mask the amount that is transaction between address's, how do we know that the fakeoutputs are correct and that is noone messing with them?

Same way as right now: key images. – Christopher King Sep 05 '16 at 14:48 — Christopher King, Sep 05 '16 at 14:48

score 7 · Answer 1 · edited Apr 13 '17 at 12:53

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RingCT does not create fake outputs. Here is a good dumbed-down explanation of its principle: ELI5: How does RingCT work?

Therefore there is no difference between "normal" transactions and RingCT ones in terms of double-spend prevention: it is handled in the exact same way using key images.

edited Apr 13 '17 at 12:53

Community

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answered Sep 14 '16 at 16:29

binaryFate

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In practice it does produce fake outputs though, I'm pretty sure, eg explained here -- hidden are the real values that sum to 0 ( or 0 - fees if fees are transparently valued) and each transaction has a public 'fake' value of 0. – bekah Dec 01 '16 at 11:40

How does RingCT prevent doublespend ?

1 Answers1