A physical printout of cryptocurrency public and private keys, representing one of the earliest forms of cold storage for digital assets.
Detailed Explanation
Paper wallets contain a printed public address (for receiving crypto) and private key (for spending), typically as QR codes. Since the keys exist only on paper with no digital copy, they are immune to online hacking. Paper wallets were popular in Bitcoin's early years before hardware wallets became available. They are generated using offline tools that create key pairs without transmitting data over the internet.
Why It Matters
While paper wallets provided an early cold storage solution, they have significant drawbacks compared to modern hardware wallets. Paper can be damaged by water, fire, or fading. Generating them securely requires careful operational security. Spending partial funds requires importing the private key into a hot wallet, potentially compromising security. Hardware wallets have largely replaced paper wallets as the recommended cold storage method.
Key Considerations
If using paper wallets, generate them on an air-gapped computer that has never been connected to the internet. Print using a printer without network connectivity or memory storage. Laminate the printout and store in a fireproof, waterproof safe. For most users, hardware wallets offer a superior cold storage experience.
Example
A Bitcoin enthusiast generates a paper wallet using an offline computer, prints the QR codes for the public address and private key, and stores the paper in a bank safe deposit box. To receive Bitcoin, they share the public address. To spend, they would scan the private key QR code into a wallet app.
Related Terms
Frequently Asked Questions
A physical printout of cryptocurrency public and private keys, representing one of the earliest forms of cold storage for digital assets.
While paper wallets provided an early cold storage solution, they have significant drawbacks compared to modern hardware wallets.
Hardware wallets have largely replaced paper wallets for cold storage. They offer better usability, allow partial spending without exposing private keys, and include secure screens for transaction verification. Paper wallets remain a valid option for ultra-long-term storage where simplicity is preferred.