In a recent interview with Decrypt, Shahaf Bar-Geffen, CEO of COTI, emphasized the critical role of privacy in the evolution of Web3 technologies. He argued that while blockchain is often praised for its transparency, this very feature can compromise user privacy, hindering mass adoption of decentralized applications (dapps).
Key Takeaways
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Privacy is essential for the mass adoption of Web3.
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Transparency in blockchain can lead to privacy issues.
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COTI employs garbled circuits technology for enhanced privacy.
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The distinction between privacy and anonymity is crucial.
The Privacy Problem in Web3
Bar-Geffen pointed out that Web3 faces a fundamental privacy issue that must be addressed for the technology to gain widespread acceptance. He noted that the transparency of blockchain, while beneficial in some respects, can expose sensitive data. "If 100% transparency is such a great idea, why do you have a shower curtain?" he quipped, highlighting the need for privacy in digital transactions.
He explained that any data transmitted on a public blockchain becomes public by definition. This includes everything from cryptocurrency transactions to sensitive application data. As a result, storing sensitive or commercially important data on a public blockchain poses significant risks.
The Need for Privacy in Dapps
According to Bar-Geffen, privacy is not just a desirable feature for dapps; it is a legal requirement. He stated, "It's not just a good idea to have privacy; it's also the law." The emergence of various privacy projects has led to different solutions, including trusted execution environments (TEEs) and fully homomorphic encryption (FHE). However, these methods come with their own limitations, such as central points of failure and high costs.
COTI has opted for a different approach by utilizing garbled circuits technology. This method allows for the use of encrypted data without the need for decryption, making it significantly faster and more efficient than FHE. Bar-Geffen noted that this technology opens up new possibilities for dapps, particularly in sectors like decentralized finance (DeFi) and real-world assets (RWAs).
Opportunities in Decentralized Finance
Bar-Geffen highlighted the potential for privacy solutions in DeFi, where public blockchains can lead to issues like front-running of trades. Institutions with proprietary trading systems need to keep their transactions private to maintain a competitive edge. Similarly, the fiduciary duty of institutions dealing with RWAs mandates the protection of client data and transaction privacy.
COTI is also collaborating with the Central Bank of Israel on the Digital Shekel Challenge, emphasizing the importance of privacy in government transactions. Bar-Geffen pointed out that as governments recognize the need for private transactions, the demand for privacy-enhancing technologies will only grow.
Privacy vs. Anonymity
As privacy technologies gain traction, they have come under scrutiny from governments and law enforcement agencies. Bar-Geffen stressed the importance of distinguishing between privacy and anonymity. He noted that users of coin mixers, for example, cannot prove the legality of their transactions, which raises concerns.
COTI's approach focuses on "selective disclosure," allowing users to control what information they share and with whom. This design philosophy aims to uphold legal standards while providing the necessary privacy features.
Conclusion
Bar-Geffen concluded by stating that privacy should be viewed as a foundational element of Web3, akin to scalability. He believes that privacy is a meta-narrative that intersects with various sectors and applications, making it a crucial building block for the future of decentralized technologies. As the conversation around privacy continues to evolve, COTI aims to lead the charge in developing solutions that balance privacy with compliance and usability.