A Guide to Account Verification
Automating account verification has become the norm for businesses to minimize fraud and validate legitimate users online. However, it'
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Product focus: Time selector
The time selector is a central feature of the Castle Dashboard and is present throughout all views where you can
7 Fraud Prevention Rules Using Device Fingerprinting
In a previous article, 9 Device Fingerprinting Solutions for Developers, I outlined a set of open source and commercial solutions
11 Ways to Pinpoint a User's True Location
Hi 👋 – I'm the founder of Castle, a developer-first fraud prevention platform that helps you automatically collect and analyze
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9 device fingerprinting solutions for developers in 2025
As the availability of unique IPs and user agents wanes and cookie reliability remains half-baked at best, device fingerprinting has emerged as a serious contender in the battle against online fraud and abuse.
7 Proxy Piercing Techniques: What Works in 2023?
Introduction With the rise of online tracking, proxy and VPN services have become a popular way to protect people'
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Swiftly identify fraud rings with instant link analysis
Castle is a real-time rules engine designed to manage fraud and risk across all touchpoints, including onboarding, login, payment, and
Enhanced User Activity Monitoring
When risk, product, and customer teams work together to prevent unwanted users from using their service, they usually lack the
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CyberNews Interview: Online businesses that handle money will be a target
Feeling like doing some quick online shopping through an attractive ad or signing up for a lucrative deal with a
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A behavioral approach to device fingerprinting
Background Online businesses connect with their customers over the internet through a device, like a laptop or phone, using a
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Announcing the Event Explorer
Today, Castle is releasing the Event Explorer, giving security and fraud teams a new way to discover and investigate malicious activity.
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Introducing the Detection of Multi-Accounting
With multi-accounting detection, you are better able to protect against account takeovers involving a single device. Also, you can now catch users who are abusing marketing incentives, such as coupons, new-account rewards or new customer referral bonuses.