Most people never think about financial privacy until it disappears. A paper bill handed across a counter reveals nothing about the person who spent it, and a bank statement is read by the customer, the bank, and, under specific legal conditions, the authorities. Both rest on a shared assumption: a stranger should not be able to look up what you earn, where you shop, or whom you support. Public blockchains quietly overturned that assumption, and Monero was built to restore it.
This explainer looks at how Bitcoin and Monero handle privacy, why the difference matters, and why regulators and law enforcement agencies remain uneasy. The argument here is simple. Financial privacy is a normal and legitimate expectation, privacy tools like Monero should be used only for legal and ethical purposes, and those two positions support each other rather than competing.
Privacy Was Always Part of Ordinary Money
Cash has always been private by default. A shopkeeper knows a sale happened, but the bill carries no history of who held it before. Banking added record keeping, and with it a different kind of privacy, one built on confidentiality. Your neighbor cannot request your account history, and a business competitor cannot browse your supplier payments. That confidentiality has limits. In the United States, the Bank Secrecy Act requires banks to keep and report certain records, and the Electronic Frontier Foundation notes that the Supreme Court, in U.S. v. Miller (1976), allowed the government to obtain bank customer data without a warrant. Still, the information stays within a closed circle rather than being published to the world.
Civil liberties groups argue that this circle should not shrink further. In its analysis of proposed cryptocurrency reporting rules, the EFF wrote that financial records “contain a trove of sensitive information about people’s personal lives, beliefs, and affiliations.” Donations to a church, payments to a clinic, or a subscription to a political publication can say a great deal about a person. Coin Center, a Washington policy group focused on cryptocurrency, makes a related case in The Case for Electronic Cash, describing private peer to peer payments as essential to an open society.
Bitcoin Is Transparent by Design
Bitcoin is often described as anonymous, but its creator never claimed that. Section 10 of the Bitcoin whitepaper explains that because all transactions are announced publicly, privacy depends on “keeping public keys anonymous.” In Satoshi Nakamoto’s words, “The public can see that someone is sending an amount to someone else, but without information linking the transaction to anyone.”
That model is better described as pseudonymous, and it has proven fragile. Every amount, every sending address, and every receiving address sits permanently on a ledger anyone can download. Once a single address is tied to a real identity, perhaps through an exchange account or a public donation page, its history and connections can be traced. Researchers showed this early. In the 2013 paper A Fistful of Bitcoins, Sarah Meiklejohn and colleagues clustered addresses using patterns such as inputs spent together and change addresses, then labeled many clusters belonging to major services. An entire industry of chain analysis firms now sells this kind of tracing to businesses and governments.
How Monero Hides Senders, Receivers, and Amounts
Monero takes the opposite approach. Instead of publishing everything and hoping identities stay hidden, it conceals the key details of each transaction while still letting the network verify that no coins are created from nothing. Three techniques do most of the work, and each targets one piece of information that Bitcoin exposes.
Ring signatures protect the sender. A transaction input is signed alongside a group of other outputs from the blockchain, so an observer cannot tell which one is actually being spent. Since the August 2022 network upgrade, the standard ring size is 16, meaning one real input hidden among 15 decoys. Stealth addresses protect the receiver. The sender creates a fresh one time address for every payment, so a person can publish a single address while incoming funds land at destinations that cannot be linked back to it. RingCT, short for Ring Confidential Transactions, hides the amount. According to the Monero project, it was introduced in January 2017 and became mandatory for all transactions after September 2017.
The US Treasury, an agency focused on illicit finance, describes the same design in its 2022 National Money Laundering Risk Assessment, listing ring signatures, ring confidential transactions, and stealth addresses as the tools Monero uses to obscure originators, amounts, and beneficiaries.
Default Privacy Versus Optional Privacy
Monero is not the only cryptocurrency with privacy features, but it is unusual in making them mandatory. Zcash, for comparison, uses zero knowledge proofs and lets users choose between transparent addresses and shielded ones. Coin Center’s primer on privacy coins reported that as of May 2020, only about 6 percent of Zcash transactions were fully shielded, while 15 percent were partially shielded.
The difference matters because optional privacy tends to mark the people who use it. When most activity is transparent, the minority that opts out stands apart, and that alone can draw attention. Coin Center notes that because every Monero transaction uses ring signatures by default, “no user draws attention to themselves by choosing whether or not to use ring signatures.” Privacy works best as a crowd, and Monero makes everyone part of the same crowd.
Fungibility and the Problem of Tainted Coins
Fungibility means one unit of money is interchangeable with any other. A dollar bill is worth a dollar regardless of where it has been. On a transparent ledger, that principle weakens. Coins can be flagged because of their history, and a recipient who had nothing to do with that history may find their funds frozen or refused.
The Monero project describes its coin as fungible precisely because transaction histories are hidden. Supporters see this as essential for anything meant to function like money. A currency where some units are worth less than others because of an invisible past is a strange kind of currency, and it places ordinary users in the position of investigating every payment they receive.
The Costs That Come With Opacity
Privacy has real tradeoffs. Monero transactions carry decoys and cryptographic proofs, so they are larger and heavier to verify than a simple transparent payment. Developers have worked to reduce that burden, most recently with Bulletproofs+ and view tags in the 2022 upgrade, but the overhead remains. Auditing is also different. On Bitcoin, anyone can sum visible amounts. On Monero, confidence in the total supply rests on cryptographic proofs rather than amounts anyone can read.
For people who need to share information, Monero offers view keys. Sharing a private view key lets an accountant, auditor, or business partner see incoming transactions to an address. The project itself cautions that outgoing transactions cannot be reliably viewed this way, so a balance shown through a view key should not be relied upon on its own. Privacy at the protocol level also does nothing to change legal obligations. In the United States, the IRS treats digital assets as property and expects taxpayers to report related income and gains, and similar duties exist elsewhere. Keeping finances private from the public is a different matter from keeping them from a tax authority, and the second remains each user’s responsibility.
Regulators Respond With Delistings and New Rules
Governments and large exchanges have pushed back. The Financial Action Task Force, which sets international anti money laundering standards, addresses anonymity enhanced cryptocurrencies in its 2021 updated guidance on virtual assets, which also explains the “travel rule” requiring service providers to obtain and pass along originator and beneficiary information for transfers. A coin that hides both parties by design fits awkwardly into that framework.
Exchanges have responded by removing Monero. In January 2024, OKX delisted Monero along with Zcash and Dash, The Block reported. Binance announced in February 2024 that it would end Monero trading, citing its periodic asset reviews, which include “new regulatory requirements” among the factors considered. Kraken halted Monero for clients in the European Economic Area on October 31, 2024, stating it had “no choice” because of regulatory changes. The European Union’s Anti Money Laundering Regulation goes further: from July 10, 2027, Article 79 prohibits crypto asset service providers from keeping accounts that allow anonymization or increased obfuscation of transactions, “including through anonymity-enhancing coins.” The rule binds regulated providers, not the software itself.
The Strongest Objections, Taken Seriously
The most serious objection is that privacy helps criminals. The Treasury assessment states that FinCEN analysis of suspicious activity reports found some ransomware actors demanding payment in anonymity enhanced cryptocurrencies, and it describes these tools as “creating additional obstacles for investigators.” The IRS was concerned enough to award two contracts, to Chainalysis and Integra FEC, worth up to $1.25 million combined in 2020 to develop tracing tools for Monero and the Lightning Network, Decrypt reported. These are real harms with real victims, and any defense of privacy has to face them honestly.
A second objection comes from researchers rather than regulators. A 2018 study by Malte Möser and coauthors, An Empirical Analysis of Traceability in the Monero Blockchain, found that many early transactions could be traced through weaknesses in how decoys were chosen. Monero later changed its protocol, but the lesson stands: privacy systems must be continually tested, and users should not assume perfection. Supporters answer the first objection by pointing out that cash, encryption, and closed doors also help criminals, yet societies keep them because the benefits to everyone else are larger. The two sides genuinely weigh those benefits differently.
Privacy and Lawful Use Belong Together
The legitimate uses are concrete. When balances are public, a person who receives a large payment can become a target for theft or extortion. Businesses need to keep supplier payments, salaries, and margins away from competitors. Journalists and activists working under hostile governments have good reason to keep their funding sources out of public view. Ordinary people simply expect their spending to remain their own business, as it does with cash.
None of these uses requires breaking the law, and that is the point. The strongest case for Monero is not that it lets people escape rules, but that it restores a level of privacy most people already consider normal. Treating privacy tools as legitimate while using them only for legal and ethical purposes is the most credible way to defend them, and the most likely path to keeping them available.
This article offers general information only. It is not financial or legal advice.
