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  1. Home
  2. /Glossary
  3. /SIM Swap
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cryptocurrency

SIM Swap

An attack where a scammer convinces your mobile carrier to transfer your phone number to their SIM card.

Definition

An attack where a scammer convinces your mobile carrier to transfer your phone number to their SIM card. Once they control your number, they can intercept SMS-based two-factor authentication codes and take over accounts. Many crypto thefts have started with SIM swaps. Use authenticator apps instead of SMS 2FA.

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Related Terms

Phishing

A social engineering attack where scammers create fake websites, emails, or messages that look legitimate to steal your credentials or trick you into signing malicious transactions.

Self-Custody

Holding your own private keys rather than trusting an exchange or service to hold them.

Hardware Wallet

A physical device that stores cryptocurrency private keys offline.

Address Poisoning

A scam where attackers send tiny transactions from addresses that look similar to ones you've interacted with, hoping you'll accidentally copy the wrong address from your transaction history.

AI x Crypto

The intersection of artificial intelligence and blockchain technology.

Airdrop

A marketing strategy where crypto projects distribute free tokens to wallet addresses.

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