How can you use blockchain to verify identity across platforms?

1 Blockchain basics

Blockchain is a distributed ledger technology that records transactions in a secure, transparent, and immutable way. Each transaction is validated by a network of nodes, or computers, that follow a consensus protocol. The transactions are grouped into blocks and linked together by cryptographic hashes, forming a chain that cannot be altered or tampered with. Blockchain can store any type of data, such as financial transactions, contracts, or identity attributes.

2 Decentralized identity

One of the potential applications of blockchain is decentralized identity, or self-sovereign identity. This is a concept that allows users to create and control their own digital identities, without relying on centralized authorities or intermediaries. Users can store their identity attributes, such as name, date of birth, nationality, or credentials, on a blockchain, and use cryptographic keys to prove their ownership and access them. Users can also choose which attributes to share, with whom, and for how long, using smart contracts or verifiable credentials.

3 Cross-platform verification

Using blockchain to verify identity across platforms has several benefits. First, it enhances the security and privacy of users and platforms, as they do not have to store or share sensitive personal information with multiple parties. Second, it reduces the friction and cost of identity verification, as users do not have to create or remember multiple passwords or undergo lengthy verification processes. Third, it improves the user experience and trust, as users can access different services with a single identity and have more control over their data. Fourth, it enables interoperability and innovation, as platforms can leverage the shared identity infrastructure and offer new services or features.

4 How to get started

To use blockchain to verify identity across platforms, you need to have a digital wallet that supports decentralized identity protocols, such as DID (Decentralized Identifier) or SSI (Self-Sovereign Identity). A digital wallet is a software application that allows you to store and manage your cryptographic keys, identity attributes, and verifiable credentials. You can use your digital wallet to create your own DID, which is a unique and persistent identifier that represents your identity on a blockchain. You can also use your digital wallet to request, issue, or verify verifiable credentials, which are digital documents that attest to your identity attributes or qualifications.

5 Examples of platforms

There are already several platforms that use blockchain to verify identity across platforms, or offer solutions for developers and users who want to implement this feature. For example, Civic is a platform that provides a secure and decentralized identity verification service, using blockchain and biometrics. Users can verify their identity once with Civic and use it to access multiple services that accept Civic as a trusted identity provider. Another example is uPort, which is a platform that enables users to create and manage their own self-sovereign identities, using blockchain and smart contracts. Users can use uPort to share their identity attributes and credentials with different platforms and applications, and control their data and privacy.

6 Future trends

Blockchain to verify identity across platforms is still an emerging and evolving field, with many challenges and opportunities. Some of the challenges include scalability, usability, standardization, regulation, and adoption. Some of the opportunities include new business models, social impact, and collaboration. As blockchain technology matures and more platforms and users adopt it, we can expect to see more innovation and integration of decentralized identity solutions, as well as more benefits and value for the digital economy and society.

7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?