Considering they track incoming payments as well as change, how do they know which one is which? If an organization wants to audit my account, and I've been sending a large number of transfers, won't they see a bunch of incoming transactions that are really just the change of the money I sent?

And will any of this change with RingCT?

up vote 7 down vote accepted

If you think about it, change comes back in the same transaction as the money you sent. If you receive X monero as change, you will have sent Y monero in the same transaction, with Y > X.

The answer to your question boils down to the key images. You give a signed set of key images to the auditor, who can now see money going in and out.

See How to prove my Monero balance to a world? for the procedure.

Nothing about this will change with RingCT.

  • So in this sense, key images almost supercede the use of a viewkey. – user4 Oct 11 '16 at 18:19
  • If by supercede, you mean supplement, then yes. – user36303 Oct 11 '16 at 19:19

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