What it means
Most cryptocurrencies run on a public ledger, which means anyone can look up an address and see every payment it has ever received. If you give a customer or employer one address and reuse it, your whole payment history is visible to anyone who learns that address.
A stealth address solves this by making each payment go to a different destination. The mechanics rely on cryptography, the mathematics of secure codes.
The recipient publishes a public key, and the sender combines it with a random number to work out a brand new address that only the recipient can detect and spend from. To an outsider the payments look unrelated, even though they all end up under the control of one person.
The recipient normally holds two kinds of secret key, one for spending and one for viewing. The viewing key lets software scan the ledger and spot incoming payments without being able to move any funds.
This split is useful in business, because a finance team can give an auditor the viewing key to prove receipts while keeping the spending key locked away. Stealth addresses are best known from privacy-focused coins such as Monero, and similar designs have been proposed for other blockchain networks.
They differ from mixing services, which pool coins from many users, because the privacy comes from the address itself rather than from a shuffle. The main trade-offs are extra complexity, a need for compatible wallets and scanning software, and closer attention from regulators.
For a finance or compliance team, the nuance is that privacy is not the same as secrecy from the tax authority. Businesses that accept payments to stealth addresses still need records that tie each receipt to an invoice, a date and a dollar value.
Good practice is to keep the viewing key and a transaction log so the books can be reconciled and an audit trail can be produced when needed.
In practice
Real-world examples.
Example
A software company pays a freelance designer $4,000 each month in a privacy-focused cryptocurrency. The designer publishes one stealth identifier, and each month's payment lands in a different one-time address. A competitor looking at the public ledger cannot tell how much the designer earns in total or who else pays them.
Example
A charity accepts donations in digital currency and does not want donors' giving histories to be traceable by anyone who visits the ledger. It publishes a stealth payment code on its website, and each donor's gift goes to a unique address. The finance officer uses a viewing key to reconcile the totals to the donation system without exposing the spending key.
Example
An external auditor is asked to confirm that a trading firm received $250,000 in crypto from a client during the quarter. The firm hands over its viewing key rather than its spending key, so the auditor can trace the incoming payments without any power to move funds. The audit is completed and the firm's treasury stays secure.
Case study
Seen in the real world.
Tidewater Components is an illustrative, fictional manufacturer that agreed to accept part of a large export payment in a privacy-focused cryptocurrency. The treasurer was nervous because the company had previously reused a single address, and a competitor had been able to estimate its monthly receipts from the public ledger.
The company moved to stealth addresses, so each payment from each customer arrived at a fresh address. Only the finance team, using a viewing key held in a secured system, could see the full picture, and it recorded every receipt against an invoice in the ledger of the business.
When the tax adviser asked for support, the team produced the transaction log and demonstrated that every incoming payment matched an invoice. The illustrative lesson is that stealth addresses protect commercial confidentiality, but they work best when paired with disciplined bookkeeping.
Watch out
Common mistakes.
- Assuming a stealth address makes payments untraceable to the tax authority, when businesses still need full records of every receipt and its dollar value.
- Reusing one published address and calling it private, when only a fresh address per payment protects the recipient's history.
- Sharing the spending key with an auditor or accountant, when the viewing key alone is enough to prove receipts safely.
Questions
People also ask.
Is a stealth address the same as a mixer?
No, a mixer pools coins from many users and returns different coins, whereas a stealth address gives each payment a unique destination that only the recipient can identify.
Do all cryptocurrencies support stealth addresses?
No, they are built into some coins by design and have to be added to others through additional protocols or wallet software, so support varies.
Are stealth addresses legal to use?
In most places using one is lawful, but rules on privacy tools, reporting and record keeping differ by country, so a business should take local advice.
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