An understanding of the specific problem being targeted is crucial for evaluating the viability and potential impact of the proposed solution.

There is a network of participants involved in the transaction process detailed within the proposal. Alice, who seems to be initiating a payment to Eve, is identifiable, but the roles and functions of other entities, such as Bob, Carol, and Dave, are less defined. These parties may act as financial intermediaries similar to money brokers or Hawaladars, potentially lending their reputations as a form of assurance for the ecash protocol proposed. Clarification on how these parties interact and ensure the security and trustworthiness of the transactions would be beneficial for a thorough understanding of the system's operation.

Furthermore, there are procedural details mentioned regarding public keys and redemption steps that warrant additional explanation. Specifically, the use of "redeemer's" public key is referenced, with the involvement of multiple redeemers—Bob, Carol, Dave, and Eve. Questions arise as to whether this public key is part of a multi-party computation (MPC) scheme or if it represents a shared secret where the private key is known by all redeemers. The structure of this cryptographic component could have significant implications for the security and privacy properties of the protocol. Thus, gaining clarity on the cryptographic mechanisms employed, including the nature and use of the public keys, is essential for assessing the feasibility and integrity of the proposed system.