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Paper Wallet

A paper wallet is a physical document containing a public address and a corresponding private key, usually represented as QR codes for easy scanning. This method of storage is the most literal form of cold storage, as it creates an offline representation of a wallet that can be stored in a physical safe or deposit box. While popular in the early days of Bitcoin, paper wallets are largely considered legacy technology due to the extreme difficulty of spending funds without exposing the private key to a digital environment.

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Definition

A paper wallet is a physical document containing a public address and a corresponding private key, usually represented as QR codes for easy scanning. This method of storage is the most literal form of cold storage, as it creates an offline representation of a wallet that can be stored in a physical safe or deposit box. While popular in the early days of Bitcoin, paper wallets are largely considered legacy technology due to the extreme difficulty of spending funds without exposing the private key to a digital environment.

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Simple explanation

A paper wallet is exactly what it sounds like: your crypto keys printed on a piece of paper. It’s the ultimate ‘offline’ storage. To use the money, you have to type the private key into a computer, which means your ‘paper’ money is now temporarily ‘online’ money.

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Why it matters

Paper wallets represent the philosophical ideal of absolute, unmediated ownership. They were the primary way to store Bitcoin securely before user-friendly hardware wallets became accessible to the mass market.

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How it works

The user visits a website or uses software that generates a private/public key pair while offline (disconnected from the internet). Once generated, the keys are printed out, and the data is wiped from the computer memory. The user then destroys the digital file, leaving only the paper, which serves as the physical vessel for the digital assets.

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Real-world example

BitAddress.org was once the go-to tool for generating paper wallets in the early days of Bitcoin.

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Advantages

  • Zero digital footprint for long-term storage
  • Free and easy to produce
  • Protects against all remote software threats

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Limitations

  • Highly susceptible to fire, water, or physical loss
  • Dangerous to spend directly from without exposing keys
  • No way to recover funds if paper is lost

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Common misconceptions

  • People think printing a private key is enough to keep it safe forever, ignoring physical damage risks. Many don’t realize that using the paper wallet’s key on an infected computer negates all its security benefits.
Canonical knowledge ID: glossary:paper-wallet