how to make theft impossible

the $5 wrench-attack problem is solved !

Hodl Safe
3 min readJul 22, 2020

today, —

Joe Hodler doesn’t feel safe going to local meet-ups!… Attackers specifically target Bitcoiners // as Jameson Lopp’s repoclearly shows…

& the most common storage methods used today — allow Attackers to easily steal all your bitcoin.

the $5 Wrench-Attack problem is a scary reality for us all, but there are now simple solutions !…

now, you CAN hodl safely !…

let’s step back and see this attack-vector in perspective —

3 major kinds of personal attacks

  1. Wrenchphysical — ranging from a opportunistic “mugging”… to a Bitcoin-targeted assault
  2. Ransomphysical — & possibly cyber
  3. Sophisticatedphysical & cyber & legal — organized crime & state-level actors

first, let’s clarify — I am not asserting that it’s possible to prevent someone from physically attacking you. Only common-sense & preparation can reduce that risk…

a skillful private-key storage strategy solves the $5 wrench-attack by

  • removing your ability to directly access your BTC
  • requiring verification of your safety
  • preventing an Attacker from simply stealing all your bitcoin

thus — forcing the Attacker into a ransom scenario’, which has additional risks for the attacker, such as police involvement & also preserves your health…

in the next level of attack, a Ransom — if someone gives the Attacker $ or BTC, that’s not ‘theft’ — it’s ‘coercion

examine incentives

let’s examine the incentives that you’re giving potential attackers based on different private-key storage strategies.

let’s start with a very weak strategy, which, crazily, is the industry-standard-practice in our community today…

“duress” pass-phrases

using them to hide your all your BTC incentivizes attackers to:

  1. attempt an attack — there is a big pay-off if saving accounts are simply hidden with a secret word
  2. continuously torture you- because you could be hiding more…

this strategy will fail !

you will lose all your BTC !

even if you’re never attacked —

  • this strategy will stress you out…
  • puts — people who don’t use duress pass-phrases — at risk, because attackers know that this is the most common strategy today

again, i must implore leaders, like SatoshiLabs & nvk to reconsider these critiques and update their recommendations !

the $5 Wrench-Attack problem is solved by —

  • reducing the incentives to attack
  • increasing the risks for the attacker
  • & specifically by — separating your access information !

there are different ways to separate your access info:

  • multi-sig software
  • seed-splitting (for example- put 12 here & 12 there)

CWAP was specifically designed to solve the $5 wrench problem…

  • separate your 24 [seed-words] from your [pass-phrase]

to summarize —

Don’t be a single-point-of-failure !

your long-term saving should NOT be accessible without high-quality verification that you are safe !

if HODLing isn’t safe, How can Bitcoin scale ?…

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Hodl Safe

Bitcoin Security for everyone — Cold-Storage — CWAP : the Counter Wrench-Attack Protocol