Keeping bitcoin safe

1. 1
   Easy levelAnatomy of a Wallet

   Open the wallet up and find out what is inside: keys, not coins.

   Open the model I've tried it

   Optional challenge What does a Bitcoin wallet actually store?

   The bitcoin coins themselves Secret keys; the coins are recorded on the blockchain A copy of your bank account Check answer

2. 2
   Easy levelThe Digital Signature Machine

   Sign with a demonstration key and see why nobody can change what you signed.

   Open the model I've tried it

3. 3
   Easy levelThe Recovery Phrase Machine

   Watch twelve words rebuild a whole wallet, using demonstration data only.

   Open the model I've tried it

   Optional challenge A support agent asks for your recovery phrase to verify your wallet. What do you do?

   Share it, since they are support staff Never share it: whoever has it controls the bitcoin Share only the first six words Check answer

4. 4
   Explore levelAnatomy of a Signing Device

   Catch an address swapped by malware by checking the device's own screen.

   Open the model I've tried it

   Optional challenge Your computer shows one address, your signing device shows another. Which do you trust?

   The computer, because it is bigger The signing device's screen Whichever was shown first Check answer

5. 5
   Explore levelThe Multisignature Vault

   Try spending from a 2-of-3 vault with different combinations of keys.

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   Optional challenge In a 2-of-3 vault one key is lost. Can the remaining owners still spend?

   Yes, the two remaining keys are enough No, all three keys are always needed Only after waiting 30 days Check answer

6. 6
   Easy levelThe Bitcoin Security Arena

   Watch an attacker race the honest network to undo a payment.

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   Optional challenge Does waiting for six confirmations make a payment impossible to reverse?

   Yes, after six it can never change No: it makes reversal much less likely, never impossible Confirmations make no difference Check answer

Finished? Choose another path or explore freely.