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Phone numbers are a goldmine for SIM swappers. A researcher found how to get this precious piece of information through a clever brute-force attack.

The course is built around a simple but powerful concept: the “4Ds of AI Fluency.” Instead of just teaching you what to type, it teaches you how to think about partnering with an AI, whether you’re using it to automate tasks, augment your creativity, or act as an independent agent.

One-time SMS codes are widely used as the second checkpoint in two-factor authentication (2FA) to sign into everything from banking apps to email accounts. As I’ve written before, though, SMS is one of the least secure 2FA methods, as it can be phished relatively easily.