Most crypto security advice assumes you have a personal, private computer. But millions of people access the internet on shared devices — family computers, work machines, or hotel terminals. Both situations carry real and underappreciated risks.
The Danger of Shared Computers
Shared computers may have keyloggers installed — software that records every keystroke, including passwords and seed phrases. Browser extensions installed by other users can intercept your session. If you must access a crypto account on a shared computer, use a hardware wallet and never type your seed phrase under any circumstances.
The Danger of Public Wi-Fi
Public Wi-Fi networks can be monitored by anyone on the same network. Man-in-the-middle attacks are easier to execute on open networks. If you must use public Wi-Fi, use a reputable VPN that encrypts your traffic before accessing any crypto-related service.
The Hardware Wallet Advantage on Shared Devices
Even if the computer you’re using is fully compromised, the hardware wallet signs transactions internally — your private keys never touch the infected machine. The attacker can see what you’re doing but cannot steal your keys.
What to Do After Using a Shared Computer
Log out of all accounts. Clear the browser history, cookies, and cached data. If you entered any sensitive information, consider that device compromised and change passwords from a secure device afterward.
— Lior H