The Privacy Dilemma in Blockchain and Crypto Payments
Changpeng Zhao, commonly known as CZ, co-founder of the global cryptocurrency exchange Binance, has highlighted a critical issue facing the widespread adoption of crypto payments: insufficient privacy on blockchain networks. He emphasized that the transparency of on-chain transactions poses significant challenges for businesses and institutions looking to use cryptocurrencies as routine payment methods for salaries, suppliers, and other expenses.
The core idea behind Bitcoin and Ethereum is transparency. Transactions are recorded on a public ledger that is accessible to everyone. While wallet addresses cannot be directly linked to names, they can often be traced over time, making it possible to connect them to individuals or companies. This level of openness raises real concerns for companies, according to CZ.
He provided a straightforward example: if a company pays its employees in cryptocurrency directly on-chain, anyone who visits the company’s wallet address could see how much each worker receives. In traditional banking systems, salary data is considered private, but on public blockchains, this information can become public. CZ also expressed concerns about personal safety, discussing with investor Chamath Palihapitiya during an episode of the All-In Podcast.
If everyone can instantly “see” how much cryptocurrency a person has or receives, they could become targets for theft, scams, or even physical threats. For high-profile individuals or corporate leaders, this visibility can become a major issue.
These concerns align with broader discussions within the crypto community. Early proponents of cryptocurrency were inspired by “cypherpunk” thinkers, who advocated for strong encryption and privacy to protect people from surveillance and control. Bitcoin was initially conceived as a peer-to-peer digital currency that could be transferred without the need for banks or intermediaries. For many early adopters, privacy was not optional—it was a foundational principle.
Business Concerns Over Transaction Transparency
Some industry professionals agree with CZ’s perspective. Avidan Abitbol, a former Business Development Specialist for the Kaspa cryptocurrency project, has argued that companies will hesitate to fully adopt crypto and Web3 systems if they cannot keep their transactions confidential. He points out that transaction data can reveal more than just payment amounts. It may expose details about supply chains, partnerships, client relationships, and overall financial activity.
For example, if a competitor studies a company’s blockchain activity, they can estimate revenue trends, identify key business partners, or track major deals. This level of transparency can put companies at a disadvantage during negotiations. It could also increase the risk of corporate theft or targeted scams. If attackers can see large transfers or identify patterns in payments, they may use that information to plan phishing attacks or other forms of fraud.
The Growing Threat of AI and the Need for Privacy
The rapid advancement of artificial intelligence adds another layer of urgency to the issue of blockchain privacy. Eran Barak, former CEO of privacy-focused technology company Shielded Technologies, has stated that AI systems will enable hackers to focus more on publicly available data, combining files and information as they go.
Centralized servers maintaining useful content are already attractive targets for cybercriminals, Barak said. As AI tools evolve, they will be able to sift through multiple sources of information for clues, connect the dots, and predict likely outcomes. With publicly available, permanent blockchain data, AI can scan large volumes of transactions to identify high-value targets.
For instance, an AI system could observe wallet activity, identify repeat payments, and estimate how much cryptocurrency a company or individual controls. Eventually, this could lead to intricate financial profiles without direct access to private accounts. Barak claims that as AI capabilities grow, onchain privacy technologies will become the new normal and will be even more important than ever before.
Innovations in Blockchain Privacy
The goal of these privacy technologies is to hide transaction details while still allowing blockchains to verify that payments are valid. A subset of blockchain projects is already experimenting with privacy-improvement tools, such as zero-knowledge proofs and other cryptographic techniques. These innovations aim to strike a balance between transparency and privacy, ensuring that users can maintain control over their financial data while still benefiting from the security and efficiency of blockchain technology.