Collection 5 of 5 · 5 cards
Safety & rules
Technology does not exist in a vacuum. These five cards explain the most common way people lose control of their keys, what a majority attack can and cannot do, and the two sets of rules that shape crypto-asset services in Europe and beyond.
Cards in this collection
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What is a recovery phrase?
A recovery phrase, also called a seed phrase, is a list of 12 to 24 ordinary words that encodes the master secret from which a wallet derives all of its private keys.
2 min read
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What is phishing?
Phishing is a type of fraud in which someone imitates a trusted person, company or website to trick you into revealing a secret — such as a password or recovery phrase — or into approving an action yourself.
2 min read
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What is a 51% attack?
A 51% attack is an attempt by someone who controls the majority of a blockchain's block-producing power — computing power in proof of work, or staked deposits in proof of stake — to rewrite recent history or block certain transactions.
2 min read
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What is MiCA?
MiCA — the Markets in Crypto-Assets Regulation, Regulation (EU) 2023/1114 — is the European Union's common rulebook for issuing crypto-assets and for companies that provide crypto-asset services.
2 min read
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What is the travel rule?
The travel rule is an anti-money-laundering requirement that makes service providers send identifying information about the sender and the recipient along with a transfer of crypto-assets, as banks already do for wire transfers.
2 min read