Academy School · Chapter 5 of 14
Wallets & Cold Storage
How ownership works, how wallets protect keys, and how to store them safely.
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Return to Academy SchoolPrivate Keys and Ownership
Control of a private key means control of the funds associated with it. Wallet software does not hold coins in the usual sense; it helps users sign transactions and manage access.
That means ownership in crypto is operational. If you can sign, you can move funds. If you lose control of the key, you lose control of the account relationship onchain.
- Keys control funds.
- Wallets manage signing, not coins.
- Operational control is the real issue.
In crypto, access and ownership are inseparable from key control.
Hot Wallets vs Cold Storage
Hot wallets are connected to the internet and are convenient for frequent use. Cold storage keeps signing keys offline, which reduces exposure to remote attacks and unwanted software.
The tradeoff is convenience versus security. The more often keys touch an online environment, the more care is needed to reduce the attack surface and verify every action.
- Hot wallets are convenient.
- Cold storage reduces online exposure.
- Security usually trades against convenience.
Choose wallet type based on use frequency and risk tolerance.
Seed Phrase Security
A recovery phrase is the master backup for a wallet. Anyone who obtains it can restore the wallet elsewhere and control the associated funds, so the phrase must be protected with exceptional care.
The best practice is simple: keep it offline, keep it private, and keep it readable only to the intended owner. Digital copies create avoidable risk because they expand the number of places the secret can leak.
- A recovery phrase restores the wallet.
- Anyone with it can take control.
- Keep it offline and private.
A seed phrase is not a note; it is the key to the vault.
Setup and Safety Rules
Good wallet setup begins with trusted sources and ends with verification. Confirm the device or app is official, check addresses carefully, and verify critical details on the device screen whenever possible.
Security is a habit, not a one-time step. Review backups, avoid sharing secrets, and assume that small mistakes can have permanent consequences.
- Use official sources.
- Verify important details on-device.
- Treat security as a habit.
Careful setup prevents many of the most common wallet failures.
Further reading