A Study on the Blockchain + Privacy Preservation with PlatON as An Example

Several Technologies for Privacy Preservation

China Academy for Information and Communications Technology (CAICT), based on the Privacy-preserving Computation Technology Research Report (2020), published by Big Data Technology and Standard Committee of the China Communications Standards Association (CCSA), classifies privacy-preserving technologies into five categories: Federated Learning, Differential Privacy, Secure Multi-Party Computation, Homomorphic Encryption, and Trusted Execution Environment. Among them, federated learning and differential privacy are mainly used in the field of machine learning, with the average complexity of encrypting the raw data, and thus are not included in the scope of discussion. In addition, there is a privacy-preserving technique based on zero-knowledge proofs in blockchain.

PlatON’s Special PoS Consensus Algorithm

According to the official white paper, PlatON will launch dedicated FPGA/ASIC-based computation hardware when appropriate. This is not simply PoW mining. PoW is just one type of consensus protocol. As long as the community reaches consensus, PoW can be changed to another type of consensus altogether, such as PoS, toward which Ethereum is practicing. However, PlatON separates consensus from hashrate, which is only used to perform privacy-preserving computation. The PlatON public chain serves the functions of distributing computational tasks, matching computational tasks with hashrate, and recording transactions, while the core computational work happens outside the public chain. Of course, you can interpret this as a PoW in disguise, but privacy-preserving computation is not a meaningless puzzle game. Even without the blockchain, these computing hardware can be put into the centralized world to provide privacy preservation.

The status quo of the industry development

There are two main development paths for the privacy-preserving segment: one is the privacy coin, and the other is privacy-preserving public chain.

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WuBlockchain

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Colin Wu, Chinese journalist, won 2013 China News Award