Lately I have been noticing how often the topic of privacy comes up in conversations about blockchain but do these conversations feel fully thought through. Most of the time privacy is treated like something that can be added later than something that is fundamental to how the system is designed. At the time transparency is still the default approach.. While this works in many cases it starts to feel limiting when we are dealing with real-world use cases that involve sensitive or personal data about blockchain.
What I find interesting is how much emphasis is placed on visibility and auditability in blockchain while confidentiality is almost treated like a compromise. There is this underlying assumption that the transparent a blockchain system is, the more trustworthy it becomes.. In practice that is not always true. In some situations much exposure can actually introduce risk especially when identity or financial behavior is involved in blockchain.
That is where something like MidnightNetwork starts to stand out to me. Not because it claims to fix the issue of privacy in blockchain but because it seems to treat confidentiality as part of the foundation of blockchain than something layered on later. The idea of bridging the gap between transparency and privacy in blockchain suggests that these two things do not have to be in conflict they can coexist, depending on how the blockchain system's designed and what it is trying to achieve.
Still this is not a balance to get right in blockchain. Adding confidentiality into a blockchain system brings its set of challenges. It changes how data is verified in blockchain, who gets to see what and how trust is actually established between participants in blockchain. There are also concerns, such as performance overhead the added complexity for developers and how blockchain systems remain auditable when parts of the data are intentionally hidden.
I have also noticed that infrastructure focused on privacy in blockchain does not get the kind of attention as things like speed or scalability. It is less visible in blockchain. You do not really notice it working unless something breaks in blockchain.. Over time it becomes critical especially if these blockchain systems are expected to support more serious or sensitive applications.
It makes me think that we are still early in understanding what confidentiality really means in blockchain systems. It is not about hiding information in blockchain. It is about controlling access to information in blockchain deciding what gets revealed, when and to whom in blockchain. That is a more nuanced challenge than simply making everything public in blockchain.
In the end I do not think trust comes from transparency in blockchain or from privacy alone in blockchain. It comes from how a blockchain system manages the space between the two. If that balance is handled carefully in blockchain it creates a kind of confidence, where people do not need to constantly verify everything themselves because they trust that the blockchain system is handling information in a deliberate and responsible way, about blockchain.