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DID（Decentralized Identifier，去中心化身份体系），作为一种新的身份标识，由传统的中心化身份衍化和派生出来，指去中介化，个人或组织完全拥有的自身数字身份的所有权，控制权以及管理权，将这部分权利完全归于用户自身。 优点 1.数据的所有权
L! o |1 t! i7 ^数据（比如交易记录，拥有的NFT及等信息）完全由所有者自身控制，不需要任何中心化的第三方参与其中，关于你身份的任何信息都完全掌握在你自己手中，没有你的授权，任何人或者公司都无法获取这些信息。 2.数据整合
0 D6 g+ l5 P7 N" aweb2.0时代，用户登录不同的平台，需要不同的账号和密码。而在web3.0时代，用户通过单个钱包，便可以授权登录不同的平台和网站。用户的操作越多，数据便越多，数据越多，便可以更好地反应自身的信誉系统，风险偏好以及偿贷能力等等一系列性格特征。 目前存在的问题： 1.隐私和透明度
8 | A5 y2 ]. K3 R0 c& h虽然数据是自己的，但由于区块链的公开性，有些人会专门追踪KOL的钱包地址，跟进KOL的每一步操作。对于大多数人来说，让别人知道自己的账户资产和各种操作，甚至可以和本人线下对应起来，对于个人来说，极端情况下，自身安全可能也会出问题，有时还要面对舆论压力以及道德谴责。当然，新注册账号可以部分（只要是大资金移动，就会被关注）避免这种情况。 2.数据量庞大1 a3 K4 K. g& |0 U$ E% W# \; l
由于区块链的不可篡改以及永久性，使得用户的数据会非常庞大，各种信息混合在一起，有效信息的筛选会变得非常困难。对于想要用用户数据来进一步进行有效利用的其他公司来说，难度会增加很多。 3.监管问题. z$ N8 d7 |3 J
新技术的出现，一般会出现各种法律法规短时间跟不上的问题。 以上是总结的DID的部分优缺点，如果你有其他的观点，欢迎进行补充。 基于数字身份的应用 从前面我们可以知道，DID作为一种底层基础设施，更多的价值，其实并不是来自于自身，而是基于其产生的一系列数据所产生的价值。
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