A SIM Swap is a socially engineered attack where a hacker gains access to a victim’s phone number by tricking a mobile carrier into transferring the victim’s number to a SIM card controlled by the hacker. Once the hacker has control of the victim’s phone number, they can use it to gain access to sensitive online apps including email, social media, and more damaging, crypto and banking accounts.
SIM Swaps are trivial to pull off because the current approach for managing and using mobile numbers is architected with two huge vulnerabilities:
How 3NUM Uses Web3 Tools and Cryptography To End SIM Swaps:
To stop SIM Swaps from victimizing users, we need to fundamentally change how numbers are managed, controlled, and used — without the reliance on a centralized counterparty.
This is where the necessity of web3 infrastructure comes in. By transforming a traditional mobile number into an NFT, 3NUM uses smart contracts, cryptography, and the blockchain to establish control of a mobile number. Once a mobile number transitions to a web3 native version, control over said number persists using cryptography, managed by controlling the private key of the wallet that minted the NFT. The blockchain then serves as a trusted ledger for verifying ownership. Once a 3NUM has been created, that number is no longer capable of returning to be a traditional web2 number.
This architectural approach not only transforms how numbers are controlled and managed, by transitioning from centralized reliance to decentralized user control — but it also functions to decouple the mobile number from the networking layer.
Instead of receiving messages directly to a SIM, messages sent to a 3NUM number are sent to the wallet address that owns the 3NUM NFT via an SMS gateway maintained by the 3NUM DAO. This simultaneously provides a seamless upgrade path and backwards compatibility with existing mobile communications. But, as more 3NUM-aware native applications are built, secure encrypted messages will skip the gateway and communicate with each other directly. Check out our “3NUM Technology Explained” article for additional information on how this works.
The elegance of this approach is that it provides the same functionality that’s achieved with a traditional number without any of the risks that come with the threat of being SIM Swapped!
If you want to get a secure web3 mobile number to protect yourself against the ever present risk of being SIM Swapped, get your 3NUM Shield now:
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