What it means
Cryptocurrency is controlled by a secret code called a private key. Whoever holds the key can move the funds, so protecting it is the main security task.
A paper wallet prints the key, and the matching public address used to receive funds, on a sheet of paper. Because the key is never stored on an internet-connected device, it cannot be stolen by malware.
That made paper wallets popular in the early years of digital assets, particularly for people planning to hold for a long time. The risks are physical and practical.
Paper can burn, fade, get wet or be thrown away by mistake, and anyone who finds or copies it can take the funds. Creating the wallet on a compromised computer or printer could also leak the key.
Spending from a paper wallet requires importing or sweeping the key into software, which exposes it to the risks the paper was meant to avoid. For this reason, many security specialists now prefer hardware devices that sign transactions without revealing the key.
For finance teams, the key point is control and record keeping. If a company holds digital assets, auditors will want evidence of who has access, how keys are backed up and how the assets are verified.
Regulators and insurers also take an interest. Cover for lost keys is hard to obtain, and a business storing digital assets on paper may find that insurers either refuse or charge high premiums.
Professional custodians, who hold keys on behalf of clients under audited controls, are one common answer.
In practice
Real-world examples.
Example
An individual investor buys a small amount of cryptocurrency and prints a paper wallet to store it for several years. She keeps two copies in separate safes. When she later wants to sell, she has to move the funds to an exchange account. The record includes who saw the paper and where it is stored.
Example
A start-up receives a gift of digital assets from an early supporter, in the form of a paper wallet. The finance manager logs the transfer, moves the funds to a company-controlled custody service and destroys the paper under witness. The auditors receive the records, including a copy of the destruction record. The finance manager also adds the custody account to the list of controlled wallets for the year-end review.
Example
A family member inherits a sealed envelope containing a paper wallet but does not know how to use it. A specialist helps to check the address and move the funds. This shows why access instructions need to be recorded for heirs. The family now keeps written instructions with their legal documents.
Case study
Seen in the real world.
Alderwick Ventures is an illustrative, fictional investment club that bought digital assets worth $60,000 and stored the keys on a single paper wallet. One member kept the paper at home to avoid the risk of online theft.
A water leak damaged the paper and made part of the QR code unreadable. The club had no backup, and it took weeks of specialist help to recover the key at a cost of $3,000.
In the illustrative review, the club moved the holdings into a custody arrangement with two named signatories and a written recovery plan. The lesson was that keeping keys offline removes one risk but adds others that need controls. The club also agreed to test a small transfer first whenever it moved funds, so that mistakes would be caught before large amounts were at stake.
Watch out
Common mistakes.
- Making only one copy of the paper wallet, so that damage or loss means the funds are gone for good.
- Generating the wallet with an unknown website or on an infected computer, which can expose the key to others.
- Assuming a paper wallet is immune to risk, when theft, fire, water and simple loss are all possible.
Questions
People also ask.
Is a paper wallet the same as a hardware wallet?
No, a hardware wallet is a small electronic device that keeps the key inside and signs transactions, while a paper wallet is just a printed copy of the key. A hardware wallet is generally considered safer for regular use, while a paper wallet suits long-term storage that is rarely touched.
Can a paper wallet be reused?
It is generally best used once, because spending part of the balance may move the rest to a new address, and the old key should not be relied upon.
Do auditors accept paper wallets as evidence of ownership?
Not by themselves, since they need proof that the holder controls the key and that the funds exist on the blockchain. Auditors often ask for a signed test message from the address, which shows control without moving the funds.
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