中国领先的公有区块链Metaverse元界，创始以来一直致力于打造集智能资产，数字身份和价值中介为一体的公有链。2017年2月11日，元界主网正式上线，经过7个月的努力，元界团队于2017年9月正式推出全球领先的数字身份及BaaS服务。

China’s leading public blockchain Metaverse, has been committed to creating a combination of smart property, Avatar and oracle as one public blockchain since its inception.
Metaverse mainnet was officially launched in 11th February 2017. After only 7 months, the Metaverse team releases the world’s leading digital identity function“Avatar” and BaaS service in September 5th.

数字身份：区块链中的缺失环节

Digital Identity: blockchain’s missing link

随着互联网的兴起，用户名和密码成为我们在各平台进行身份验证的常见方式。各类中心化机构和第三方授权验证方式繁琐，彼此身份系统不互通，并且个人身份信息的安全性和隐私性也难以保证，重复登记也浪费了大量的时间和资源。在这种情况下，基于区块链技术的数字身份正被进行广泛研究，为行业内存在的相应问题提供解决方案。

As Internet emerges, usernames and passwords have become a common method of digital identity authentication. Data sharing and repeated register of centralized institutions as well as third-parties still exist, which can’t soundly guarantee security and privacy of personal information and also wastes a lot of time and resources.

在当前的区块链生态系统中，存在一系列不同的区块链协议和实施方案。所有身份问题都会进入这样一个程序，即：证明谁拥有什么和谁做了什么。虽然匿名性在比特币这样的协议中具有一些优势，但是当区块链技术及其应用在全球实施时，匿名性并不是一个强大的特质。我们需要知道我们正在处理的是什么，我们通过名字对人们的身份进行识别，而不是一串数字。而在许多公有区块链协议中，身份问题常常被忽略。这是一个缺失的环节，因为它可以让区块链数字资产的概念蓬勃发展，并让区块链上的金融应用在数字银行体系和其它金融机构中发挥作用。

There are a number of different blockchain protocols and implementations in the current blockchain ecosystem. All identity issues must follow this process: to prove who owns what, and who does what with whom. While anonymity has some advantages in certain protocols such as Bitcoin, it will not be a powerful trait when blockchain technology and its applications are implemented globally. We need to know what we are dealing with, and we identify people by their names rather than a string of numbers. The ‘missing link’ in blockchains is therefore identity, which is often overlooked in many public blockchain protocols: it would allow the concept of digital assets to flourish and financial applications to display their full potential in online banking and other financial institutions.

元界数字身份的特点

Feature of “Avatar” Digital Identity

元界的数字身份将基于现有的区块链生态体系搭建，并根据元界区块链提供的底层功能，围绕BaaS及钱包来开展数字身份的应用，以期为各行各业提供可验证、可授权的基础设施服务。

Avatar (Digital identities) will be based on the Metaverse ecosystem and its underlying functions. Its applications will be centered around BaaS and the Metaverse Wallet, aiming to offering verifiable and authoritative infrastructure services for all walks of life.

数字身份是用户所拥有的主私钥所对应的账户的Profile信息的统称。Profile拥有一个全网唯一标识，在元界中，我们称该标识为DID（Digital Identity，可类比比特股的别名）。数字身份包括Oracle的角色和普通用户的角色，任何Oracle和普通用户都可以通过构建数字身份参与到数据身份的应用中来。

An avatar is the general name given to an account’s profile information, corresponding to the master private key belonging to a user. Each profile has a unique identifier called DID (Digital Identity, similar to an alias for Bitshares) in Metaverse. Avatar include the roles of Oracle and ordinary users.

与数字身份相关联的有效链下数据的登记，大致需要以下四步：

1.拥有数据的用户在元界建立其数字身份，并提供其自有格式的数据，将数据打包提交给负责数据鉴定与背书的Oracle；

2.具备鉴定数据资格的Oracle（数字身份的一种）鉴定该数字身份所提交的数据的有效性、真实性；

3.经数据所有者和Oracle签名后的资产将通过主私钥与数字身份绑定；

4.其他用户可以在数据所有者的授权之下，查看该数据资产所代表的详细信息。

Registering valid off-chain data associated with an avatar requires the following four steps:

1, Users with data must establish his/her avatar on Metaverse, provide data with its own format, and submit this data to an Oracle who is responsible for data authentication and endorsement.

2, Oracles (one of the Avatar) qualified to endorse data will verify the validity and authenticity of the submitted data;

3, After the data is signed by its owner and an Oracle, it will be bound with the owner’s avatar through master private keys.

4, other users can view detailed information about this data after the data owner’s gives his authorization.

元界区块链推出BaaS服务

Blockchain as a Service

元界首次提出了BaaS（区块链即服务）的概念，即企业或个人可以根据自己的实际需求，向区块链解决方案供应商定制区块链服务。元界的BaaS框架主要面向商业用户，随着元界基础设施的不断完善，其服务对象可能不止于此类用户，商业用户的划分也不能再以传统的形态来判断，它将可以是任何主体，即广义上的数字身份。

The concept of BaaS (Blockchain as a Service) was first proposed by Metaverse, that is to say enterprises or individuals can customize blockchain services for blockchain solutions providers according to their actual needs.

Metaverse’s BaaS (Blockchain as a service) framework mainly caters to business users, such as individuals or businesses with transaction or asset management needs. Business users can no longer be grouped as they traditionally were and BaaS must be able to cater to any user, even digital identities.

我们相信数字身份及Bass的应用场景将会涉及保险、借贷、审计、征信等领域，随着元界数字身份体系的不断完善，未来，元界将会提供更多基础性的服务设施，以便更多第三方开发者能够基于元界区块链进行应用插件的开发，让更多普通用户能够便捷地使用我们的钱包及身份管理服务。

We are convinced that digital identities and Bass application would be used in the fields including insurance, borrowing, audit as well as credit. Metaverse continues to improve its digital identity system and will expand on the available basic services so that more third-party developers can develop plug-in applications based on the Metaverse blockchain, increasing the ease of use of our Wallet and identity management services for ordinary users.

For more detail, you can download the Avatar white paper via http://mvs.live now.