The following is a guest post and an opinion of Dr. Benjamin Beckmann, CTO at midnight.
Blockchain technology makes us much more exposed than you may realize – certainly more exposed than the traditional financial system.
Take the example of buying a cup of coffee. In the traditional financial system, the transaction is simple: you tap your card and walk away. The barista forgets as soon as it is done, and your bank ensures that nobody has access to your transaction data. In other words, nobody knows when, where or what you bought, except for you.
Imagine the same transaction in the world of web3. The details of that coffee purchase no longer end at the counter. Instead, they become part of a public report. Although transactions are pseudonyms, wallet addresses and behavioral patterns can be analyzed over time, allowing third parties to distract your identity and follow your financial activity.
Everyone could in theory see when, where and what you bought, as well as with whom you transact. But this is not the standard: wallet addresses are not universally linked to the identities in practice. The risk arises when patterns arise over time, especially when someone is repeatedly performed with the same portfolios or exchanges that require KYC, making it easier to draw conclusions about their activity and to link it to a real identity.
Although not every user is necessarily compromised, linking routine transactions – groceries, subscriptions, gifts – can create a detailed map of your personal habits over time. This type of transaction racing has been used earlier. In a known case, attackers followed the portfolio activity on OpenSea to identify high-quality goals, which led to a phishing attack that resulted in more $ 1.7 million in stolen NFTs. Even worse, the very reputation of Web3 for transparency means that both institutions and consumers overestimate these types of risks, which hinder more widespread acceptance.
Blockchain Technology, which substantiates Web3, is made to improve transparency and efficiency. It promised users to give them control over their data and interactions. Although it has partly achieved those goals, it has also introduced a problem: daily transactions that were once private, run the risk of public exposure, and transparency itself can be a turn for potential users. For both individuals and companies, this raises a critical question: is this what we really want?
The transparency of Web3 costs a cost
In many financial systems, privacy measures vary in strength, but they generally offer more discretion than on blockchain -based transactions. For example, when you use a credit card, the details of the transaction do not find their way to a public database.
Although banks and payment processors can see transaction data, both legal guarantees and priorities for business development encourage them to limit unauthorized access and to maintain the privacy of users. Cash, on the other hand, offers even greater anonymity, because it does not leave a digital footprint. These payment methods ensure safe transactions while the individual privacy is protected.
The basis of web3, on the other hand, is radical transparency. Details of each transaction are permanently admitted to a public blockchain. This transparency was intended to build trust and reduce fraud by preventing tampering or double expenses. Yet the transparency of blockchain is a double -edged sword.
By keeping transaction patterns, time stamps and behavioral data transparent, the design of blockchain ensures that transaction data is accessible to anyone who wants to look around. Although wallet addresses do not contain personally identifiable information, they create a trail of transactions that can be analyzed. If a wallet address is ever linked to an identity, via a centralized exchange, an Ens domain, a social media post or an NFT purchase that is linked to an e -mail, everyone can follow the past and future transactions to build a clear financial map of the individual.
Although pseudonymity or coding can offer a sense of safety, there is in reality a different layer of vulnerability: metadata or the information about transactions. Although it may seem harmless, metadata can reveal considerable insights when it is aggregated. Patterns come to the fore those individual habits, preferences and weaknesses can uncover.
This lighting is not just theoretical. Coingecko confirmed an infringement of the security in which attackers gained access to 1.9 million e -mail addresses of users, together with metadata such as IP addresses, location of E -mail OpenS and subscription details. The hackers then sent more than 23,000 phishing -e -mails and tried to exploit these metadata to mislead users to reveal sensitive crypto wallet -references. This case emphasizes how apparently small data points, in combination with publicly visible blockchain transactions, can be merged to identify and target individuals.
The implications go beyond individuals. Companies are equally exposed as the transparency of transactions on chains Within Supply Chains Can unintentionally reveal sensitive operational details or patterns. For example, competitors Can derive activity patterns or strategic shifts by analyzing transaction trends, making it possible to undermine the competitive advantage of a company. In a world where privacy is already scarce goods, Web3 strengthens these vulnerabilities instead of alleviating them.
How can we design a better web3?
The question then becomes: how can we design systems that retain the benefits of blockchain and at the same time limit privacy risks? The solution lies in reconsidering how data is treated with each step.
An approach is to develop privacy-per-design systems that inherently limit the exposure to data. These systems go beyond blockchain and can be found in tools such as Secure Messaging Apps (eg Signal) and Privacy -oriented browsers (eg Brave), which minimize data collection while retaining the usability. The challenge is greater in the blockchain context because transparency is built into technology. To tackle this, Platforms must keep sensitive information locally on the user’s device and avoid fully generating metadata to ensure that no sensitive traces are left behind.
The key to this approach is selective disclosure – a concept of data – minimalization that users offer more control over what information they share. When applying for a loan or renting a house, for example, private individuals only have to share the specific financial details that are relevant to suitability – not their full transaction history or other unnecessary personal data.
Similarly, users in social media institutions must be able to verify their identity to make accounts without sharing not -related private information, such as date of birth or specific location.
Selective disclosure is particularly relevant in sectors such as healthcare. For example, when applying for health insurance, individuals must only be able to share the medical information needed to determine the suitability without exposing their entire medical history.
Such systems enable individuals to safely communicate with control of their data. The same principle applies to education, whereby students must be able to verify their qualifications for a job without sharing irrelevant details about their academic history.
These solutions show that privacy is not incompatible with transparency. The point is to find the right balance, giving users control over what they share and ensure that sensitive information remains protected.
A call for balance
Web3 has succeeded in delivering transparency and control to users, but it has not yet fulfilled its promise of true empowerment. For Web3 To achieve widespread acceptance, the reform of how we handle sensitive data must be priority. Without robust data protection, both individuals and companies are left vulnerably left, unable to fully participate in this new era of technology.
The task that pre -developers, CTOs and security experts come is is clear: building systems that give priority to user control, generating metadata generation and obscure transaction patterns. By making use of privacy-per design principles and selective disclosure, we can make the following evolution of blockchain that combines transparency with discretion.
Only when blockchain finds a balance between protecting sensitive data and transparency can we move a future in which users are really authorized to buy, associate and interact without fear of exposure.