I already know the answer of a) part which is Alice. Can anybody help me in finding answer of b) part.
1What information are we to assumer 'the observer' has? Do they know the A/B/C tagged addresses are controlled by A/B/C? Do they know for certain which addresses are change addresses? In general, 'certainty' of blockchain analysis is a somewhat hopeless goal in the real world. – chytrik – 2018-10-12T23:08:28.973
Just out of curiosity, where does this question come from ? It's, strangely, identical to one of the HWs in one of my classes. – Shawn – 2018-12-02T22:37:30.223
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