Abstract
Running behind new technologies is increasingly becoming a non-circumventable requirement for organisms’ survival. This is not only a strategy to gain a competitive advantage in the market but it is a determinant key for their continuity and persistence. The Blockchain is at the heart of this technological revolution for which transparency, accessibility to the public and the sense of sharing are fundamental properties of its design. Despite its importance, leveraging this technology in an ethical and secure manner by ensuring confidentiality and privacy is a top concern. Through this work, we try to design a new approach to validate transactions within the Blockchain. Entitled "Protocol for Partial Confidentiality & Transparency PPCT", this new protocol makes possible to seek a compromise between the two requirements: Confidentiality & Transparency. It allows introducing a new notion of confidentiality that we have named partial confidentiality. Subsequently, it applies it on the transactions exchanged while ensuring the process of their validations by the different nodes of the Blockchain. In addition, and through the use of hashing and digital signature functions, this protocol also ensures integrity and authentication within its validation process. To present this work, we will first discuss the state of the art on the different current privacy approaches and our motivation behind this work. Then we will explain more about the different stages of this process, its benefits and areas for improvement.
Highlights
Blockchain, the founding technologies of cryptocurrency is very fashionable and on trend recently [1]
We presented the various related works in this context that are generally designed at the basis of secure calculation algorithms namely: Attribute-Based Encryption (ABE), Secure Multipart Calculation (SMPC), Homomorphic encryption and Non-interactive zero-knowledge proof (NIZK) algorithms
We gave the detailed description of our solution entitled "Protocol for Partial Confidentiality & Transparency (PPCT)" by discussing, at the end of the article, its advantages over other equivalent systems
Summary
Blockchain, the founding technologies of cryptocurrency is very fashionable and on trend recently [1]. Its fields of application have not stopped expanding to serve different sectors, including banks, insurance, the pharmaceutical industry, supply chains. It is at the heart of the current digital technological revolution and considered by some to be the revolutionary successor to the Internet [3]. The decentralized architecture of the Blockchain results from its constitution as a distributed P2P (peer-to-peer) network. The latter is made up of a set of nodes through which the exchanges and storage of information present in chained blocks (called a chain of blocks) and linked to each other are carried out. It is guaranteed fundamentally in the blockchain by cryptographic processes and in particular asymmetric cryptography [4]
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