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From Wrench Defense

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A $5 Wrench Attack is a physical or social engineering attack where an attacker uses coercion, intimidation, or violence—symbolized by a cheap tool like a $5 wrench—to force a Bitcoin user to reveal their private keys, seed phrases, or access to their crypto funds. Unlike digital cyberattacks (e.g., hacking or phishing), this attack targets the human element, exploiting physical or psychological vulnerabilities.

TLDR

Bad guys will kidnap you and torture you for your bitcoin.

Prevention Strategies:

To mitigate the risk of a $5 wrench attack, Bitcoin users should adopt robust security practices: Maintain OPSEC: Avoid publicly disclosing Bitcoin holdings or wealth. Use pseudonyms online and limit sharing on social media.

Physical Security: Store seed phrases and hardware walletsin secure locations, such as a safe deposit box or a hidden safe. Consider tamper-evident storage solutions.

Multi-Signature Wallets: Use multi-signature (multisig)setups requiring multiple keys held in different locations or by trusted parties, making coercion less effective.

Duress Codes: Some hardware wallets support duress PINs that unlock a decoy wallet with minimal funds, misleading attackers.

Geographic Distribution: Store backups (e.g., seed phrase copies) in multiple secure locations to reduce the risk of losing everything in one attack.

Personal Safety: Be aware of surroundings, avoid flashy displays of wealth, and consider self-defense training or home security systems.

Plausible Deniability: Maintain a small, visible wallet for daily use while keeping the majority of funds in a hidden, cold storage wallet.