“Assuming an attack timeframe of 12 months, our findings show that an attacker can trace up to 47.63% of the transaction inputs at a cost of just 1,746.53 USD. Moreover, we show also that more than 90% of the inputs are affected by our tracing algorithm.”

FloodXMR: Low-cost transaction flooding attack with Monero’s bulletproof protocol

https://eprint.iacr.org/2019/455.pdf