How Blockchain Technology Can Improve Personal Privacy

From cryptocurrency transactions to secure supply chain tracking, blockchain technology has evolved far beyond its early days as the backbone of bitcoin. However, its most intriguing potential lies in the personal privacy protections it can offer everyday Internet users. Cyber threats seem to increase daily and lurk in every corner of our online lives. Personal privacy remains a concern for everyone with a digital connection. The good news is that advances in technology and digital security continue to evolve and offer us new ways to protect our sensitive information. For example, blockchain offers potential cybersecurity protection that can revolutionize how we store, share, and protect personal data. Let’s take a look at how blockchain works, how it could reshape digital privacy, and where it’s already making an impact. Blockchain is a type of distributed ledger technology (DLT) that’s used in numerous applications, most notably, blockchain plays a central role in cryptocurrency . Rather than storing information in a single, centralized database, it records transactions in chronologically ordered, linked “blocks.” Each block contains a cryptographic hash of the previous block, transaction data, and a timestamp. This makes the chain virtually impossible to alter without network authorization. The blockchain features that can help in digital privacy measures include: Blockchain eliminates the need for a central authority and offers a built-in layer of security. Even if a hacker compromises one server, they cannot alter the overall ledger without network access. With cyberattacks, mass surveillance, and data breaches on the rise, who has access to your information and how they use it is more vital than ever before. A 2023 Pew Research Center study found that 81% of Americans believe the risks of companies collecting their personal data outweigh the benefits. While privacy laws and security tools have made some progress, vulnerabilities remain, especially in centralized systems that are a prime target for cybercriminals. Most modern online services, from social media platforms to e-commerce websites, use centralized databases to store personal data. A single breach can expose millions of users’ information, as seen in many high-profile incidents . Blockchain changes that dynamic. By distributing encrypted data across many nodes and requiring network consensus for changes, blockchain minimizes the risk of large-scale data theft. Foundationally, blockchain increases privacy protections. Here’s how blockchain and privacy connect: Blockchain is widely known as a crucial component in cryptocurrency. Nevertheless, its applications for privacy protections cover multiple industries. Here are some examples of how it’s used: Decentralized identity (DID) solutions use blockchain to let people prove who they are without handing over excessive personal details. Blockchain technology provides a secure and transparent DID solution for digital identity recognition by using self-sovereign identity systems (SSIs) that allow people to control and manage how and with whom they share their digital identities. Blockchain helps to increase privacy by using a distributed ledger to store and verify your personal data. For example, digital wallets with robust cybersecurity protections, such as Google Pay, use blockchain technology. Blockchain-based systems can secure and store medical records in a way that only gives access to authorized providers and patients. Blockchain technology can also be used in remote patient monitoring and telemedicine for the secure exchange of data and personal information. For example, MediBloc is a blockchain-based and patient-centric electronic health record (EHR) platform that provides the secure sharing and management of health records and gives patients rightful ownership of their records. Blockchain offers the healthcare industry increased privacy measures, from facilitating clinical trials to supply chain management for medication. Messaging platforms that use blockchain technology to securely encrypt messages can record communication metadata without exposing the content of sent messages. If you’ve ever been hacked on Facebook Messenger or another messaging platform, you may have felt overwhelmed and frustrated. Blockchain can significantly reduce the risk of cyber attacks via messages or calls. For example, Wispr uses blockchain technology for all calls, messages, and file transfers. This prevents third parties from accessing or intercepting messages. Blockchain can help to verify the authenticity of products being sold, purchased, or shipped without revealing confidential data. This helps to thwart cyberattacks and prevent counterfeiting and fraud. For example, a U.S. “clean eating” startup, ZEGO Foods , uses blockchain technology to provide trackable food products and educates consumers with transparency about food purity. Blockchain and privacy protection can go hand-in-hand. Blockchain offers a combination of security, control, and transparency that traditional databases struggle to match. For example: Blockchain ledgers provide a transparent history of all data interactions, which helps you to quickly detect unauthorized access. Cryptography encryption renders data unreadable for unauthorized users who don’t have the right key. Distributed storage reduces the chances of a single, catastrophic breach. You can manage who has access to your personal data and can revoke access when necessary. Blockchain erases the use of centralized intermediaries who might misuse or sell your data. It also provides protections against the “backdoor data access” of unauthorized parties. Blockchain-powered privacy tools are still emerging and evolving for widespread use. However, here are practical ways you can take advantage of blockchain technology now: Some newer virtual Private Network (VPN) services like Orchid use blockchain to decentralize their networks. This makes it difficult for any single provider to log your activity. DID platforms can verify your identity and avoid oversharing personal information. Digital wallets are as convenient as they are secure, and many businesses will accept this form of payment. You can use a digital wallet like Google Pay and leave your credit card at home. As with any technology, do your research before adopting blockchain solutions, as they are not all created equal. Blockchain technology has the potential to shift the balance of power over personal data away from corporations and governments, and back to individuals. While technical and legal hurdles remain, the combination of decentralization, encryption, and user control could make blockchain one of the defining privacy tools of the digital age. Discover more on blockchain and privacy by visiting the What Is My IP Address blog and listening to the Easy Prey Podcast , available to stream on your favorite podcast platforms.