Sorry my mistake. My comment was about Section 4, not Section 3. RingCT is immune to the methods in Section 3 as stated in the last paragraph of Section 3. Se

Sorry my mistake. My comment was about Section 4, not Section 3. RingCT is immune to the methods in Section 3 as stated in the last paragraph of Section 3. Section 4 does not trace any transactions. It identifies a probability bias which make the ring sigs less efficient, but still functional.