In the spring of 2026, I found myself staring at a blockchain explorer at 2 a.m. in Nairobi, tracing a series of Tether transactions that appeared to originate from an address associated with a Tehran-based exchange. The amounts were modest—a few hundred thousand dollars each—but the pattern was unmistakable. This was not a random collection of retail trades; it was a structured, deliberate attempt to move value across borders without touching the traditional banking system. The U.S. had just announced another round of economic pressure on Iran, and somewhere in the ether, the Iranian financial system was quietly adapting. I closed my laptop and thought about the irony: the same technology I had spent a decade evangelizing as a tool for financial inclusion was now being used as a lifeline for a sanctioned state. And the 'economic pressure' that Washington kept escalating was, in many ways, chasing a ghost through a network that was designed to be resistant to such pressure.
The news brief was thin—just a few lines about intensified U.S. sanctions, the usual diplomatic dance, and a warning that these measures could undermine future negotiations. But as someone who has spent years auditing smart contracts and building educational platforms for decentralized finance in Kenya, I know that the real story is not in the official statements. It is in the ledger. When I read between the lines of the announcement, I saw a deeper truth: the efficacy of economic sanctions has been quietly eroded by the very technologies I teach. The question is not whether the U.S. can squeeze Iran's economy—it clearly can—but whether that squeeze still produces the intended political outcomes. And the answer, based on what I have seen in the data, is far more complex than any headline suggests.
To understand this, we have to start with the philosophical premise that underpins both sanctions and cryptocurrencies. Sanctions are a form of code. They are rules written by governments, encoded into the legal and financial infrastructure, designed to enforce a particular behavior on a target state. When the U.S. imposes sanctions on Iran, it is writing a global rule that says: 'You cannot access the international financial system unless you comply with our demands.' The system enforces that rule through SWIFT, through correspondent banking relationships, through the extraterritorial reach of the dollar. It is, in effect, a centralized protocol with a single authority controlling access. For decades, this protocol worked reasonably well. Then blockchain arrived, and with it, a parallel financial infrastructure that no single authority controls.
The core insight I have drawn from years of observing both worlds is that sanctions are a centralized protocol, and crypto is its shadow. Iran did not need to become a pioneer in blockchain technology to benefit from this shadow. It simply needed to find a way to move value outside the reach of the dollar clearing system. Stablecoins, particularly USDT and USDC, became the obvious answer. These are dollar-pegged tokens issued on public blockchains, redeemable for physical dollars by their issuers, but tradable peer-to-peer without any bank involvement. For an Iranian importer trying to pay a Chinese supplier, the process is simple: buy USDT with Iranian rials from a local broker, send the tokens to the supplier's wallet, and the supplier converts them to yuan or physical dollars. The U.S. Treasury can see these transactions on a public ledger, but it cannot block them. It can only sanction the addresses, an effort that is trivially defeated by generating new ones.
This is not speculation. Based on my work with blockchain analytics tools and my conversations with researchers who track illicit finance, the volume of Tether flows to and from Iranian exchanges has grown steadily since 2020, with significant spikes during periods of heightened sanctions. The irony is that the stablecoins are pegged to the very currency the sanctions are designed to deny—the U.S. dollar. The Iranian financial system has effectively found a way to access dollars without the U.S. government's permission, defeating the primary mechanism of economic coercion. This is the elephant in the room that every sanctions policy discussion ignores. We are living in an era where economic pressure can be routed around, not because the sanctions are ineffective, but because the architecture of global finance has changed.
Let me trace this with a specific example from my own audit experience. In 2023, I was involved in a project to build a cross-border payment corridor for small businesses in East Africa. We used a stablecoin-based settlement system because it was cheaper and faster than correspondent banking. At some point, I noticed that a portion of our transaction flows was coming from Middle Eastern IP addresses, including some that geolocated to Iran. I raised the issue with my team, and we implemented basic compliance filters. But the point was already made: if a small educational project in Nairobi could inadvertently facilitate Iranian access to stablecoins, then a dedicated, well-funded sanctions evasion network could do it at scale. The technology is fundamentally permissionless. It does not ask for a passport. It does not care about sanctions lists. It simply requires internet access and a smartphone.
This brings me to the second layer of the story: the role of decentralized finance, or DeFi. In the early days, DeFi was celebrated as a tool for financial inclusion—a way for the unbanked to access lending, borrowing, and trading without intermediaries. In Kenya, I have seen young developers build DeFi applications that help farmers pool their harvests into tokenized assets, providing collateral for small loans. But DeFi is also a powerful tool for sanctioned states. Decentralized exchanges, such as Uniswap and its clones, allow anyone to swap tokens without identity verification. Lending protocols, such as Aave, allow users to collateralize one asset and borrow another, creating a web of liquidity that is difficult to monitor. Iran's developers are sophisticated enough to use these tools. I have analyzed smart contracts that appear to have been written by Persian-speaking developers, implementing complex routing strategies to obscure token flows. None of this requires a central authority. It is just code, running on a global virtual machine, indifferent to the geopolitical battles waged above it.
The third layer is the mining network. Iran has some of the world's cheapest electricity, largely subsidized by its government. This has made the country a major hub for bitcoin mining, despite the official stance being somewhat ambiguous. Miners earn bitcoin by securing the network, then convert that bitcoin locally or abroad, effectively turning subsidized energy into freely transferable digital assets. The U.S. has sanctioned a handful of Iranian mining operations, but the decentralized nature of mining means that new operations pop up faster than they can be traced. I recall a paper I read in 2024, which estimated that Iran's bitcoin mining revenue could reach several billion dollars annually. That figure might be optimistic, but even a fraction of it represents a significant hole in the sanctions wall. The economic pressure that Washington applies through traditional channels is partially being absorbed by this digital escape valve.
Now, let us consider the contrarian angle, because I have no interest in painting a one-sided picture. The reality is that cryptocurrencies are not a magic bullet for Iran. The volatility of bitcoin makes it a poor store of value for a country under financial stress. Stablecoins, despite their name, carry counter-party risk: Tether's issuance is controlled by a company that could, in theory, freeze addresses at the behest of the U.S. government. Circle's USDC has taken a more proactive stance, freezing funds linked to sanctioned entities. This means that Iran's reliance on stablecoins is a dependency on American-allowed financial infrastructure—a truce that can be revoked at any moment. I have seen evidence of this fragility. In 2023, when Tether cooperated with the U.S. Department of Justice to seize funds from a sanctioned exchange, the Iranian crypto community reacted with panic. They scrambled to move into other assets, but the options were limited. The shadow financial system, it turns out, still has a shadow—the will of the issuers.
Moreover, the very transparency of blockchain cuts both ways. Every transaction is recorded on a public ledger, and analytics firms like Chainalysis and Elliptic have become highly skilled at clustering addresses and attributing them to entities. The U.S. Treasury's Office of Foreign Assets Control (OFAC) has built a sophisticated database of sanctioned crypto addresses, and while evasion is possible, it is not cost-free. Each bypass requires operational security, new wallets, mixing services, and delays. These costs add up, particularly for large-scale transfers. Iran's economy is not a few individuals moving thousands of dollars; it is a national oil industry trying to repatriate billions. Moving that kind of value through crypto is theoretically possible but practically testing the limits of decentralization. The anonymity of the blockchain is a myth for large transactions; it is more like a pseudonym that can be pierced with enough surveillance.
The deeper truth I have discovered through my work is that the 'success' of sanctions is not measured by how much value is blocked, but by how much friction is created. Even if crypto allows Iran to move a fraction of its oil revenue, the additional costs, delays, and risks act as a de facto tax, reducing the economic efficiency of the state. This friction might be sufficient to alter Iran's calculation in a way that pure denial would not. But it also creates a strange paradox. The more the U.S. relies on financial surveillance to enforce sanctions, the more it pushes targeted states toward non-sanctionable channels. In that sense, the U.S. is not just pressuring Iran; it is pressuring the global financial system to adapt its own vulnerabilities. Every dollar that Iran is forced to move through decentralized channels is a testament to the limits of American power.
I saw this paradox play out in a project that haunts me. In 2025, a group of Iranian developers reached out to me, offering to translate some of my educational content into Farsi. They admired my work on smart contract security. I was flattered, and I nearly agreed. But then I paused. I knew that my content, aimed at teaching secure coding practices, could also be used by someone building sanctions evasion infrastructure. I declined, citing my commitment to ethical standards, and I do not regret that decision. But it left me with an acute awareness of the gray zone in which blockchain professionals operate. The same code that empowers a Kenyan farmer to access global liquidity also empowers an Iranian merchant to bypass international law. The technology does not discriminate. We, the builders, are the ones who must grapple with these ethical dimensions.
And this is where my skepticism about the 'economic pressure' policy becomes concrete. The U.S. approach to Iran has been consistent for decades: apply pressure, tighten the screws, hope for a change in behavior. But the screws are no longer attached to the same machine. The financial infrastructure that made sanctions so effective in the 1990s and 2000s is being replaced by a decentralized, global, permissionless system. The U.S. can still impose costs, but it cannot impose the same level of control. The question is whether Washington is willing to acknowledge this shift. The article's report of 'intensified economic pressure' suggests that the U.S. is still operating under an old paradigm, treating the Iranian economy as a centralized entity that must comply or collapse. In reality, Iran is becoming a hybrid economy, with a formal sector under sanctions and an informal crypto sector that is largely beyond reach.
I have spent my career building bridges between the technical and the philosophical. I have argued that decentralization is an ethical imperative, not just a technical feature. But watching the Iran situation unfold has forced me to confront the uncomfortable shadows of this belief. The same properties that make blockchain revolutionary—censorship resistance, transparency, immutability—also make it a refuge for sanctioned actors. There is no way around this duality. We cannot have the benefits of openness without also tolerating the costs. The question is how we, as a community, respond. Do we embrace a purist stance, refusing to implement compliance measures on the grounds that 'code is law'? Or do we accept that this technology, like every human tool, must be shaped by ethical frameworks? I have chosen the latter. I co-authored the African AI-Blockchain Ethics Charter precisely because I believe that laws and principles can evolve alongside code. Sanctions policy must likewise evolve, recognizing that the old tools are no longer sufficient.
My own lived experience during the 2022 bear market taught me that resilience requires adaptation. When my educational platform lost 60% of its donations, I did not cling to the old funding models. I pivoted to open-source curriculum development, built a smaller team, and focused on what mattered: providing honest, risk-aware education to students in underserved communities. The U.S. and its allies need a similar pivot in their approach to economic statecraft. They cannot simply increase the pressure and expect the same results as before. They need to understand the new terrain, the blockchain shadow that moves value around the world, and they need to develop tools that are as adaptive as the technology itself. This is not a call to abandon sanctions; it is a call to rethink how they are designed.
One possible direction is to target the intersection of crypto and fiat. Even if Iran can move assets on-chain, eventually those assets must be converted into something useful—fuel, food, machinery. The on-ramps and off-ramps are the chokepoints. If the U.S. can pressure exchanges and over-the-counter brokers to enforce sanctions-related know-your-customer rules, it can create friction that no amount of decentralized cleverness can fully eliminate. But this requires cooperation from exchanges, many of which are wary of losing business. And it requires a global consensus that the U.S. currently lacks. China and Russia have their own reasons to keep sanctioned entities flowing. The result is a fragmented regulatory landscape, where a token might be perfectly legal in Dubai but sanctioned in New York.
I think about the 2017 audit I performed for the ZEIP-20 standard. I argued that technical neutrality often masks systemic bias. The same is true in global finance. The neutrality of blockchain does not mean it is free from power dynamics; it simply means that power is distributed differently. The U.S. has found a new adversary in this distribution—not Iran itself, but the coordination costs that decentralization imposes on centralized authorities. Every time Washington announces 'intensified economic pressure', it is also announcing a new round in a game of cat and mouse that the mouse is slowly winning.
Yet I refuse to be nihilistic. The same technology that allows Iran to evade sanctions also allows activists inside the country to receive funding, allows journalists to track the movement of government assets, and allows ordinary citizens to protect their savings against inflation. The ledger is not inherently evil or good; it is a mirror of our choices. What matters is the moral code we bring to its construction. That is why I keep writing, keep teaching, keep advocating for transparency and accountability. Because if all we are doing is building better tools for evasion, we have lost the plot.
In the end, the real story of the U.S. intensifying economic pressure on Iran is not about oil or uranium or the balance of power in the Middle East. It is about the architecture of international order. For decades, that order was enforced by a centralized financial system. Now it is being challenged by a parallel system that no one fully controls. The U.S. can respond with more pressure, but it must also recognize that pressure is no longer a scalpel; it is a hammer. The nuanced work of diplomacy, of understanding the adversary, of designing incentives—this has not become easier. It has become harder. And the silence between the blocks, where transactions whisper their secrets, is where the future of statecraft will be decided.
As I close this essay, I am reminded of the words of the Iranian developer who once asked me for help. He saw blockchain as a tool for freedom from an oppressive regime. I saw it as a tool for empowerment of the marginalized. Neither of us was wrong. But between those two visions lies a space of enormous tension, a space where the U.S. policy of economic pressure is trying to operate. It is not working as intended, and it will not work until we confront the uncomfortable truth that the ledger does not care about our geopolitics. It only cares about the mathematics of trust. Our task, as builders and citizens, is to make that trust mean something honorable. That is the real challenge. And it is one that no sanctions list can solve.
Building libraries where others build empires.