Duress Wallet

A duress wallet is a decoy cryptocurrency wallet designed to be surrendered if you are physically coerced into unlocking your funds. It holds a deliberately modest, sacrificial balance. When an attacker forces access, you reveal the duress credential, which opens only the decoy, while the bulk of your holdings remain protected and ideally unprovable. The concept is a direct response to the so-called wrench attack: no matter how strong your cryptography, physical force can compel a human to comply.

Common implementations

The most widespread mechanism is the optional BIP-39 passphrase, sometimes called the 25th word. Entering only the PIN and seed opens a standard wallet with a small balance; adding the secret passphrase derives an entirely separate hidden wallet. Some hardware wallets also offer a dedicated duress PIN that unlocks a decoy account. Either way, the attacker sees a real, working wallet with real funds and has no obvious indication that more exists.

Using one responsibly

For the decoy to be convincing, the sacrificial balance should be plausible for your apparent circumstances, an unrealistically small amount can provoke an attacker to push harder. A duress wallet is a harm-reduction tool focused on protecting you from theft and violence; it is not a substitute for not advertising that you hold Bitcoin in the first place. The strongest defense remains never becoming a target.

A duress wallet is an applied form of plausible deniability and a key part of physical-threat operational security for self-custodians.