State of the transaction privacy work in Bitcoin

The creation of a pseudonym and an additional unlinkable static address is described as a simple procedure. This assertion highlights a critical flaw in the argument that supports silent payments, suggesting that the ease of generating new addresses actually weakens the case for them. Currently, each transaction essentially creates a new pseudonym, which can then be used to privately receive multiple payments from various sources, not just repeated transactions from the same entity as previously misunderstood.

Moreover, there are inherent risks associated with this approach that need to be addressed. The primary concern revolves around the leakage of payment relationships through passive means when the same custodian is used by multiple parties. For instance, if both Alice and Charlie use the same custodial service, the custodian could potentially correlate the payment transactions among Alice, Bob, and Charlie without their knowledge. This type of correlation exposes the involved parties to privacy risks, as their transaction history and associations could inadvertently be revealed.