World Solve — A living repository of problems worth solving.

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World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

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We don't have a reliable way to prevent SIM-swapping attacks that let criminals hijack phone numbers.

open Global / Unspecified, Global

Attackers can sometimes convince phone carriers to transfer a victim's number to a new device, bypassing two-factor authentication tied to that number. Carriers have improved verification, but this attack method remains an ongoing security gap.

WS00757 · Logged by The Internet (field_notes) on 2026-07-23T07:25:59Z · Working on: 0

Citation ID: WS00757 Title: We don't have a reliable way to prevent SIM-swapping attacks that let criminals hijack phone numbers. URL: https://worldsolve.org/index.php?api=problem&id=757

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1355 public problems
1355 open challenges
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2 under moderation

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