Nonetheless, customers can voluntarily surrender the privateness of their cash if they need regulation enforcement to hint stolen funds. For this, a consumer would want to disclose his distinctive cryptographic key to, say, the police, after which the police can see when these stolen cash are being spent at a restaurant, a retailer or different form of service provider, as a result of retailers, not like particular person customers, can be identified to the system. So the police would have the ability to discover the place that service provider is, go there and arrest the thieves, Chaum mentioned.