How Monero Works: The Only Truly Private Cryptocurrency

The technical deep dive into why Monero succeeds where Bitcoin fails at privacy

State of Surveillance Editorial Team

🔒 The Privacy Champion

While Bitcoin transactions are completely transparent and traceable, Monero was built from the ground up to be private, anonymous, and untraceable. This isn't marketing, it's mathematics and cryptography working to protect your financial privacy.

Last updated: 2026-08-05. Claims re-verified against primary sources on that date.

The Privacy Problem with Other Cryptocurrencies

Before diving into how Monero works, it's crucial to understand why other cryptocurrencies fail at privacy:

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Bitcoin & Ethereum

Transparency: Every transaction is public and permanent

Traceability: Graph analysis of the public ledger can group addresses and attach them to identities, a result demonstrated on Bitcoin as early as 2011[1]

Persistence: Once linked, all historical transactions become attributable

Reality: Surveillance companies track everything

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Monero

Privacy by Default: Every transaction is private

Untraceability: Cannot determine transaction source

Unlinkability: Cannot link multiple transactions to same user

Undetectable: Cannot determine transaction amounts

Monero's Three-Layer Privacy System

Monero uses three complementary technologies to achieve complete privacy:

1. Ring Signatures: Hiding the Sender

🎭 How It Works

The Problem: In Bitcoin, it's obvious which address sent money

Monero's Solution: Ring signatures mix your transaction with several "decoy" transactions, a construction that goes back to Rivest, Shamir and Tauman in 2001[4]

Result: Observers see multiple possible senders, can't determine which is real

Ring Size: 16, which is 15 decoys plus the one real output. The size is not a user setting: it has been uniform across all transactions since release 0.13.0[2] and was raised to 16 in the August 2022 network upgrade[3]

📊 Ring Signature Example

When Alice sends Monero to Bob, her transaction gets mixed with 15 other unrelated transactions. The blockchain shows all 16 as potential senders, but only Alice's signature is real. Even if someone knows Alice has Monero, they can't prove she's the one who sent this specific transaction.

2. Stealth Addresses: Hiding the Receiver

🎯 How It Works

The Problem: In Bitcoin, receiving addresses are public and reused

Monero's Solution: Every transaction creates a unique, one-time address[5]

Process: Bob publishes a public address, but Alice's payment goes to a unique stealth address

Result: Only Bob can detect and spend funds sent to his stealth addresses

🔐 Technical Detail

Stealth addresses use elliptic curve cryptography to generate unique addresses from Bob's public keys. Alice uses Bob's public view key and spend key to create a one-time address that only Bob can claim. This happens automatically, users never see the complexity.[5]

3. RingCT: Hiding Transaction Amounts

💰 How It Works

The Problem: Bitcoin amounts are visible (e.g., "2.5 BTC sent")

Monero's Solution: Ring Confidential Transactions (RingCT) encrypt amounts[6]

Cryptographic Proof: Proves transactions balance without revealing amounts[7]

Result: Blockchain shows transactions occurred, but not how much was sent

Why This Matters for Privacy

Monero's privacy features combine to create true financial privacy:

🕵️ Against Surveillance

Monero resists the on-chain analysis that works on Bitcoin, and the published attacks show where the line sits. The two best known studies, by Kumar and colleagues and by Möser and colleagues, recovered real spends from Monero transactions made before RingCT was mandatory and before ring size was fixed, mainly by exploiting inputs with no decoys at all[8][9]. Later work has had to go outside the protocol: a 2024 analysis got its results from wallet application bugs rather than from the chain's cryptography[10]. Tracing Monero is a commercial market rather than a settled impossibility, and tax authorities have paid for the attempt: in 2020 the IRS awarded Chainalysis and Integra FEC contracts together worth up to $1.25 million to build Monero tracing tools[11]

🏛️ Against Government Tracking

The protection is cryptographic rather than procedural, so there is no company holding a ledger of who paid whom that a court order could compel. Reach comes from elsewhere: governments buy tracing capability[11], they hold the identity records of every exchange a user passes through[13], and network-level exposure is a separate problem that Monero's own documentation leaves to Tor or I2P[12]

🔒 Against Exchange Surveillance

While exchanges know your Bitcoin history, they cannot see your Monero transaction history once you withdraw to your wallet.

⚖️ Against Financial Discrimination

Merchants cannot see your wallet balance or transaction history, preventing price discrimination or refusal of service.

Limitations and Considerations

While Monero provides excellent privacy, users should understand its limitations:

⚠️ Privacy Considerations

  • Exchange Points: Buying/selling Monero on exchanges creates surveillance points
  • Network Analysis: Timing and IP address correlation still possible, which is why the daemon supports Tor and I2P[12]
  • Wallet Security: Private keys must be protected like any cryptocurrency
  • Wallet Software: Bugs in wallet applications have leaked information the protocol was hiding[10]
  • Legal Status: Large exchanges have dropped Monero under regulatory pressure. Binance ended XMR trading on 20 February 2024[13]

Comparison with Privacy Coins

Feature Monero Zcash Dash Bitcoin
Privacy by Default ✅ Always ❌ Optional ❌ Optional ❌ Never
Sender Hidden ✅ Ring Signatures ✅ zk-SNARKs ⚠️ CoinJoin, off by default[14] ❌ Transparent
Receiver Hidden ✅ Stealth Addresses ✅ Shielded Addresses ❌ Public Addresses ❌ Public Addresses
Amount Hidden ✅ RingCT ✅ zk-SNARKs ❌ Visible ❌ Visible

Performance and Scalability

Monero's privacy comes with trade-offs that users should understand:

📊 Technical Trade-offs

  • Transaction Size: Block 3,733,600 carried 13 transactions in 22,183 bytes, the individual transactions running from 1,531 bytes upward[15]. Figures that put a Monero transaction at roughly 25 times a Bitcoin one date from before Bulletproofs, which cut the average transaction size by at least 80% when it activated in October 2018[16][17]
  • Verification: Bulletproofs+ was added in the August 2022 upgrade specifically to decrease transaction size and verification time[3]
  • Blockchain Size: Storage is heavy enough that pruning is a first-class option. A pruned node drops 7/8 of the ring signature data, saving about two thirds of the disk space while keeping the full transaction history[18]
  • Mining: RandomX is optimised for general-purpose CPUs on purpose, to discourage specialised hardware and spread the block rewards more evenly[19]

These trade-offs are the cost of making privacy the default rather than an option.

Future Developments

Monero continues to evolve with privacy-focused improvements:

🔬 Ongoing Research

FCMP++: Full-chain membership proofs would retire ring signatures in favour of a proof that the spent output is somewhere in the entire set of outputs. It has not activated. The integration pull request is still an open draft[20] and the hard fork milestone that would carry it is still open[21]

Carrot: The addressing and output scheme being built alongside FCMP++. Its core pull request is open and unmerged[22]

Triptych and Seraphis: The previous generation of proposals, both dormant. The Triptych research issue has had no activity since February 2020[23] and the Seraphis address scheme issue none since April 2024[24]. Triptych was a logarithmic-sized linkable ring signature scheme, not a larger ring[25]

Atomic Swaps: Decentralized exchange with Bitcoin

Getting Started with Monero

Ready to use truly private cryptocurrency? Start with our setup guide:

🚀 Next Steps

Learn to Use Monero: Complete Setup Guide

Understand the Risks: Crypto Privacy Reality

Support Privacy Journalism: Donate with Monero

References

  1. Reid and Harrigan, "An Analysis of Anonymity in the Bitcoin System" (arXiv, 2011)
  2. Moneropedia, Ring size: uniform ring size enforced from release 0.13.0
  3. getmonero.org, Monero 0.18.0.0 "Fluorine Fermi" release: ring size increased to 16, Bulletproofs+ added to decrease transaction size and verification time, for the August 13th 2022 network upgrade
  4. Rivest, Shamir and Tauman, "How to Leak a Secret" (ASIACRYPT 2001), the original ring signature construction
  5. Moneropedia, Stealth address
  6. Moneropedia, Ring Confidential Transactions
  7. Shen Noether, "Ring Signature Confidential Transactions for Monero", IACR ePrint 2015/1098
  8. Kumar, Fischer, Tople and Saxena, "A Traceability Analysis of Monero's Blockchain", IACR ePrint 2017/338
  9. Möser et al., "An Empirical Analysis of Traceability in the Monero Blockchain" (arXiv, 2017)
  10. Hammad and Victor, "Monero Traceability Heuristics: Wallet Application Bugs and the Mordinal-P2Pool Perspective" (arXiv, 2024)
  11. Decrypt, "IRS Dishes Out $1.25 Million for Data Firms to Crack Monero" (September 2020)
  12. monero-project/monero, ANONYMITY_NETWORKS.md: running the daemon over Tor and I2P
  13. CoinDesk, Binance to delist Monero privacy token, XMR slides (6 February 2024)
  14. Dash documentation, CoinJoin and InstantSend: mixing is disabled by default and must be started by the user
  15. Monero block explorer, block 3,733,600 (5 August 2026): 22,183 bytes, 13 transactions, per-transaction byte sizes listed
  16. Moneropedia, Bulletproofs: "the size of an average transaction has dropped by at least 80%"
  17. Bünz et al., "Bulletproofs: Short Proofs for Confidential Transactions and More", IACR ePrint 2017/1066
  18. Moneropedia, Pruning: saves 2/3 of storage by removing 7/8 of the ring signature data
  19. Moneropedia, RandomX: CPU-optimised proof of work adopted from release 0.15
  20. monero-project/monero pull request 9436, "[WIP] full-chain membership proof++ integration" (open draft)
  21. monero-project/monero, "fcmp++ hf" milestone (open)
  22. monero-project/monero pull request 9559, "carrot_core" (open)
  23. monero-project/research-lab issue 66, "Multi-index Triptych" (last activity February 2020)
  24. monero-project/research-lab issue 92, "Seraphis Address Schemes" (last activity April 2024)
  25. Goodell, Noether and Blue, "Triptych: logarithmic-sized linkable ring signatures with applications", IACR ePrint 2020/018
  26. Koe, Alonso and Noether, "Zero to Monero", second edition (PDF)
  27. Monero Research Lab papers
  28. Blum, De Santis, Micali and Persiano, "Noninteractive Zero-Knowledge" (PDF)

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