Overview The Business Problem The technology platform had been experiencing a barrage of account takeover attacks. Fraudsters were also abusing the sign-up process for account enumeration--whereby attackers attempt to verify whether or not a user account exists. The company needed to increase defense against fraudsters attacking their platform, but without blocking good users. The legacy solution was no longer fit for purpose as it was being circumvented at scale by bad actors using automated tools and cost-effective solvers. It offered no protection against human-driven attacks, but good customers experienced high intervention rates and were frequently being locked out of their own accounts. Authentication challenges were time-consuming and had low completion rates for legitim

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