Burnable Pseudo-Identity: A Non-Binding Anonymous Identity Method for Ethereum

The concept of identity has become one common research topic in security and privacy where the real identity of users must be preserved, usually covered by pseudonym identifiers. With the rise of Blockchain-based systems, identities are becoming even more critical than before, mainly due to the immutability property. In fact, many publicly accessible Blockchain networks like Ethereum rely on pseudonymization as a method for identifying subject actions. Pseudonyms are often employed to maintain anonymity, but true anonymity requires unlinkability. Without this property, any attacker can examine the messages sent by a specific pseudonym and learn new information about the holder of this pseudonym. This use of Blockchain collides with regulations because of the right to be forgotten, and Blockchain-based solutions are ensuring that every data stored within the chain will not be modified. In this paper we define a method and a tool for dealing with digital identities within Blockchain environments that are compliant with regulations. The proposed method provides a way to grant digital pseudo identities unlinked to the real identity. This new method uses the benefits of key derivation systems to ensure a non-binding interaction between users and the information model associated with their identity. The proposed method is demonstated in the Ethereum context and illustrated with a case study.PoSeID-on is a project funded by the European Commission. This project has received funding from the European Union’s Horizon 2020 program under Grant Agreement n◦ 786713

Leveraging Blockchain Usage to Enhance Slag Exchange

Publisher Copyright: © 2024 by the authors.The slag generated as a by-product of the steelmaking process can be used to manufacture cement, reducing the generated waste and contributing to the circular economy. Currently, steelmaking companies promote long-term bilateral deals with one or few cement companies where the price is fixed, and the slag is a treated as commodity. We propose a new solution, which promotes slag reuse through its differentiation with a composition-based grouping and an auction. This process is carried out in a blockchain network, which increases trust in the system, provides guarantees about the slag composition to cement companies and helps external regulators to reliably extract circularity indicators.Peer reviewe

Towards Cost-Efficient Management for Power Purchase Agreements Using Blockchain Technology

Publisher Copyright: © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.The difficulty for two parties to efficiently manage the contract conditions and clauses defined in a Power Purchase Agreement introduces several challenges. This manuscript addresses the current management limitations that arise during its lifecycle and offers a new vision adequate to the business implications, the need of transparency and the requirements of edge computing continuous monitoring. Considering the relevant actors, the main scenarios driven by the Power Purchase Agreements and their state-of-the-art contract designs, this manuscript proposes a novel method and procedure to enhance the cost-efficiency of the installations, granting the consumer self-management and the confidence and the guarantee of origin through a trustworthy distributed solution. The method proposed enables total traceability and integrity on the PPA performance in the long-term by applying blockchain technology. A new operational design is proposed, explaining the energy balance and energy cost formulas required by businesses. The results show that blockchain enhances the way of managing data, the data ownership, and the market opportunity.Funding. The research presented has been done in the context of SDN-microSENSE project. SDN-microSENSE has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 833955. The information contained in this publication reflects only the authors’ view. EC is not responsible for any use that may be made of this information.Peer reviewe