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IEEE/ICACT20210137 Slide.04        [Big Slide]	Oral Presentation
	However, many law enforcement agencies are not aware of this crisis because of its complicated technology and innovative operating processes. It is difficult to track the bitcoin flow due to its UTXO (Unspent Transaction Output) transaction characteristics, which is different from traditional strategy for financial flow investigation. Therefore, we implement a rule-based detection framework to discover change wallets from bitcoin transactions and visualize its structural characteristics.

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