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ACCOUNT, Featured, PAYMENT

The dangers of one-time passcodes (OTPs)

Written by Paul Amery on March 17, 2025

More in ACCOUNT:

  • Unseen Money 16—synthetic identity fraud January 26, 2026
  • US banks are exposed to a fake ID crimewave January 21, 2026
  • The rise of techno-fascism October 27, 2025

We all now use one-time passcodes (OTPs) to verify our identity online.

In the last few weeks, I’ve personally received OTPs from Amazon, Apple, Google, the UK Driving Licence Authority, my pension provider, payments app Yotta, National Savings and parking app Ringgo. Some OTPs were sent to me in text (SMS) messages, others arrived via email.

Identity authentication online using OTPs is much safer than using a single piece of information like a password. But OTPs are not safe, for a number of reasons.

In the latest episode of “Unseen Money” from New Money Review, security researcher Timur Yunusov and I discuss some recent scams that involved stolen OTPs—from a $2m theft from the family of a Moscow teenager to an industrial-scale carding operation in China.

Our story covers the security of mobile networks, tech giants Apple and Google, the business models of criminal masterminds and bagfuls of stolen phones shipped around the world.

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The New Money Review podcast brings you the best minds from the world of money.

From economics to payments, financial markets, technology, law, digital assets, crime and fraud, you’ll find an episode that interests you. 

Recent

  • Unseen Money 16—synthetic identity fraud

    Unseen Money 16—synthetic identity fraud


  • US banks are exposed to a fake ID crimewave

    US banks are exposed to a fake ID crimewave


  • Unseen Money 15—Why passkeys won’t take off

    Unseen Money 15—Why passkeys won’t take off


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    Unseen Money 14—the AI malware threat


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New Money Review covers innovations in money and their implications for our financial, social and political systems.

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