译文/Translated：
对于研究区块链技术的组织来说，隐私依然是最重要的事。不管是采用公共还是私人区块链平台，围绕着数据隐私的普遍做法都在不断升级，因此这也让它成为启动所有项目时最需要关注的部分，从而在保护持股人利益的同时能够减少政策和合规性上的担忧。
隐私的解决方案必须在获取数据和透明度上取得平衡。为了支持本行业，最近Block.one带领一个联盟更好地了解当今地区块链隐私标准。我们启动了EOSIO数据隐私工作小组，其目标是研究、提议和革新区块链隐私解决方案。
工作组包括来自Jack and the Blockstalk、Block.one、dfuse、EOS哥斯达黎加、Digital Scarcity、Europechain、EOS阿姆斯特丹、Rewired.One、和Gimly等的贡献者，换言之，它包括来自整个区块链和金融服务行业的专家。
我们审阅的协议包括EOSIO为基础的系统、Hyperledger Fabric & Besu、Consensus Quorum、R3 Corda和EY的 Nightfall。工作组发现在这些网络部署中有这么几个常见的主题：
- 区块链部署普遍采用加密技术：大多数面向企业的或转换隐私的解决方案会利用哈希算法
- 链上合约促进协作：要实现数据隐私小组和更广泛的身份管理和接入控制之间的协作，共有的公共账本是普遍做法。
- 交易有大量的代码分享操作：智能合约代码的公开程度有多层隐私。尽管有些解决方案仅允许授权的伙伴浏览代码，但还有一些，仅共有账本的成员都可以浏览代码。
- 关于数据隐私的创新可以帮助加快数据迁移：从能够升级系统的角度来说，利用加密存储的数据依然面对着巨大的挑战。
- 注意力从多链方案转向共有账本：对每个数据关系都使用多个账本这种方式被淘汰了。人们现在更倾向于带有隐私数据集/交易的共有账本，这样可以提高规模化程度。
了解了这些之后，EOSIO数据隐私工作组未来会关注建议如何改进区块链数据隐私解决方案。小组现在以记录和公开资源以及和开发者、应用者、利用区块链技术实现隐私解决方案的公司的对话为基础，已经在一个同行审议的报告中发表了其研究结果。
Jack and the Blockstalk的创始人和顾问Jack Tanner也为报告做出了贡献。他认为区块链系统给组织带来的好处比一般认为的还要微妙。“一般我们认为区块链更开放、更公开，但是通过减少组织间的操作摩擦并让组织能够在必要时保持隐私信息，它们实际上促进了更多合作关系。”
Block.one的技术产品经理，Roshaan Khan也参与了本报告。他认为，在区块链平台的背景下，隐私栈的重要性更重。“解决隐私问题要具体问题具体分析，但是整体的结论是区块链技术的隐私还在不断升级，我们没有一个万能药。但是，我们现在在利用EOSIO推动加密技术的未来，我也很高兴能为这个研究做出贡献。”
为了大众的利益，我们荣幸地公开了工作小组的研究报告。下载和阅读完整报告，请点击此处。请注意，报告中提到的观点属于作者所有，并不一定反映了作者、审阅者和工作组成员雇主的观点。
原文/Original：
Privacy remains a chief priority for organizations working with blockchain technology. Whether implementing a public or private blockchain platform, the evolving state of general practices surrounding data privacy keep it a focal point for the successful launch of any venture to protect stakeholder interests while mitigating regulatory and compliance concerns.
Privacy solutions must strike a balance between data access and transparency. In support of industry efforts, Block.one recently led a consortium to better understand challenges with today’s blockchain privacy standards. We launched the EOSIO Data Privacy Working Group, the objective of which is to research, propose, and innovate blockchain-based privacy solutions.
Bringing together experts from across the blockchain and financial services industries, the working group includes contributors from Jack and the Blockstalk, Block.one, dfuse, EOS Costa Rica, Digital Scarcity, Europechain, EOS Amsterdam, Rewired.One, and Gimly among others.
Protocols reviewed include EOSIO-powered systems as well as Hyperledger Fabric & Besu, Consensus Quorum, R3 Corda, and EY’s Nightfall. The group identified the following common themes within these network deployments:
- Use of cryptography is prevalent among blockchain deployments: Most business-facing or changeover privacy solutions use a hashing algorithm.
- On-chain contracts facilitate coordination: A shared public ledger is commonly used to coordinate between data privacy groups and more generally manage identities and access control.
- There is a wide range of code sharing practices for transactions: There are a variety of levels of privacy around smart contract code visibility. While some solutions only permit authorized peers to view code, others make the code accessible to members of the shared ledger.
- Innovations around data privacy would help accelerate data migration: There are still significant challenges when using cryptographically stored data in terms of being able to update systems.
- Shared ledgers upstage multiple blockchain-based approaches: Using multiple ledgers for each data relationship was abandoned in favor of a shared ledger with private data collections/transactions to improve scaling.
With these themes in mind, the EOSIO Data Privacy Working Group’s roadmap highlighted a set of recommendations on how to evolve a blockchain-based data privacy solution. The group has now published its findings in a peer-reviewed report, based on documentation and open resources as well as conversations with developers, implementers, and companies using blockchain technology to facilitate privacy solutions.
Founder and Consultant for Jack and the Blockstalk, Jack Tanner, contributed to the report. He describes the advantages offered by blockchain-based systems to organizations as more nuanced than generally perceived. “Blockchains are often viewed in terms of open and public, but they actually enable more collaborative relationships by reducing operational friction between organizations and allowing them to retain the ability to withhold private information when necessary.”
Block.one Technical Product Manager, Roshaan Khan, also contributed to the report. He expands on the importance of a privacy stack in the context of blockchain platforms. “Solving for privacy varies from case to case, but the overall conclusion is that privacy in blockchain technology is still evolving, with no one size fits all approach. However, we’re involved with implementing the future of cryptography with EOSIO and are excited to contribute this research.”
We are happy to share the working group’s research findings publicly for the benefit of all. To download and read the full report, please visit here. Please note that the views and opinions expressed in this report belong solely to the authors, and do not necessarily reflect the views and opinions of the authors’, reviewers’ or working group members’ employers.
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