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Blockchain reshapes digital identity

Time : 30/07/2022 Author : 1pu4c6 Click : + -
        In the current era of Internet and digital transformation, one of the most important characteristics is "digitization", and the basis of digital activities is the digital identity of users. Only by ensuring the authenticity and validity of the user's digital identity can we ensure that the information data of a series of activities and transactions associated with it are true and effective. Blockchain technology provides a reliable digital identity solution to a certain extent by virtue of its characteristics such as decentralization, multi-party consensus, difficulty in tampering, openness, transparency and traceability. In the information age, with the popularity of mobile Internet, everyone has several accounts, including various mobile devices, websites and app applications. These accounts are digital identities.
        Compared with the ID card in real life, digital identity is the identity in virtual life and the basis of various social activities on the Internet. However, all activities in the virtual world are always inseparable from real identity information. Individuals on the Internet are the sum of identity information, which is called digital identity. Nowadays, digital identity is crucial to digital life. According to the data report of McKinsey, by 2020, identity verification is expected to become a market worth 20 billion US dollars, and other related services are as high as 100 billion US dollars. Idcfuturescape also released a report saying that "identity will be a new security defense line. Hundreds of millions of people will have blockchain digital identity. Through verifying the identity of each user, verifying each device, restricting access and privileges, and relying on machine learning, we can analyze our behavior and gain deeper insights.".
        At present, China is at the critical stage of digital transformation. There are many problems such as imperfect digital infrastructure, insufficient capacity of digital resources development and utilization, and challenges faced by digital society governance. The pain points in the development of digital identity field caused by these problems also need to be solved effectively. At present, the digital identity information of users often exists in different departments, industries and enterprises. Their digital identity systems are not connected with each other. The information of the same person is isolated in different centralized systems. The process of mutual authentication between systems is complex, and it is difficult to carry out consistent collaborative management. In addition, informatization only solves the efficiency problem, and the data management mode is relatively backward.
        First, the problem of information asymmetry. A person may have multiple sets of digital identities in multiple systems, and the identity information is not uniform, which also causes a huge waste of data storage resources and time. Secondly, more and more hacker attacks increase the security risk of data management. At present, although the network identities of the major platforms are basically real names, the users have only obtained identity authentication and have not really mastered the control of identity information, which has resulted in many problems. For example, it is impossible to determine whether the user who is using this digital identity is himself, so it is difficult to trace the authenticity and validity of the digital identity information in the system from the source, and it is even more difficult to correspond the reality with the network identity.
        The premise of using Internet services is to solve the problem of identity identification and authentication. The use of different services requires multiple different authentications. At present, the identity authentication means of various departments and platforms are relatively simple and inefficient, which hides a large risk of personal privacy information disclosure, which may lead to the user information being trafficked, causing serious property and related interest losses. Moreover, the traditional centralized identity authentication relies on the stability of a single system. Once the centralized organization has data leakage, it will cause serious information security events, and the fault tolerance is too low. On May 25, 2018, the general data protection regulation (gdpr) came into effect. Its main purpose is to curb the abuse of personal information, which is a bill to protect personal privacy.
        The act stipulates that "enterprises shall obtain the consent of users when collecting, storing and using personal information, and users have absolute control over their personal data". With the digital identity gradually becoming the identity of people on the Internet, the authenticity, security and confirmation of digital identity have gradually become the focus of attention. Under this demand, the technical features of blockchain technology such as distributed storage, tamper proof, traceability, asymmetric encryption and zero knowledge proof provide new solutions for identity authentication and information protection. The blockchain digital identity can change the management mode of existing data, from the information owned by a single owner to the information that can be shared throughout the recording cycle, and it can operate safely on the distributed platform protected by encryption.
        At present, the government, enterprises and major Internet platforms are independent of each other, and each keeps its own core data. Using the blockchain technology to build an alliance chain system between different departments, relying on the corresponding smart contract, consensus mechanism and incentive system can effectively drive the government, enterprises and platforms to share data, and promote the flow, integration and sharing of data information. At the same time, blockchain digital identity provides a way for users to participate more in information management. Users can selectively share information with institutions through public keys, or authorize the government to use public keys and private keys to read or change the contents of their personal account books. The user has the right to select, authorize, delete and restore the identity data. In different application scenarios, the user can authorize the corresponding data. The user has absolute autonomy over his identity data.
        The blockchain digital identity has the characteristics of decentralization, but it does not mean that it can completely replace the original centralized institutions. Instead, it can promote consensus among the centralized institutions in all walks of life and solve the confidentiality problem of user privacy. Blockchain technology can ensure the authenticity and validity of the data on the chain and realize the "authenticity" of the data. However, there may be risks in the authenticity of the data off the chain and the process of transferring to the chain, which cannot guarantee the "de forgery". Before the data is linked, the identity can be confirmed by an authoritative organization and an authoritative credit endorsement (such as government certification) can be issued to ensure the legal compliance of the identity and the authenticity and validity of the data from the source.
        Secondly, by means of smart contracts and incentive mechanisms, departments and enterprises are driven to circulate information in different applications to form the exchange and connection of information in the whole industry. In addition, every data on the chain is truly and completely recorded in each node under the "supervision" of other people, with sufficient evidence and traceability. All participants need the authorization of the parties when obtaining other personal information. Personal identity information belongs to sensitive data, which should be distinguished in the application process. Public data with low privacy level can be kept on the network, and extremely important private data can be kept on the user equipment, forming a complete mode of "on Chain + off chain" and "public + private".
        In the digital identity era of blockchain, people can package their complete digital identity information and identity certificates on the chain, give hash values and time stamps, and become verifiable real identity data. By using the asymmetric encryption mechanism, distributed storage, full traceability and other features of the blockchain, the data privacy of users can be fully protected, the integrity and privacy of all users' contacts, transactions and data can be best protected and managed, and the right to handle their own information can be realized. Outsiders' understanding of their trading behavior is limited to the process level. Based on the full understanding of digital identity, combined with the characteristics of blockchain Technology & mdash& mdash; Decentralized, distributed storage, timestamp, tamper proof, consensus mechanism, smart contract, etc. we can find that there is a clever connection between digital identity and blockchain technology. In the blockchain era, both are indispensable, cooperate and promote each other.
        At present, the development of digital identity system is inevitable, and the blockchain technology also provides a relatively reliable solution to a certain extent.
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