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Canvas Fingerprinting in the Wild

Every day, your computer renders dozens of these without you even noticing. Strange patterns, colorful shapes, and emojis—what do you think these are? These are canvas fingerprints, a technique used...

Industry •

Anatomy of a 6-day Credential Stuffing Attack From 2.2M Residential IPs

In this article, we cover the details of a heavily distributed credential-stuffing attack that targeted a major US financial service company (spoiler: there were some pretty clear signs of device spoo...

Fixing the blind spots in fraud prevention

Fraud prevention fails when you can’t see what’s happening on your platform. Most companies rely on basic fraud prevention tools that only scratch the surface, leaving them blind to deeper patterns of...

Product Focus: Overview Page

Our mission at Castle is to equip you with the most effective tool to detect and stop bad actors within your application. In the majority of cases, stopping these bad actors is not a one time effort,...

8 Common Types of Account Abuse

Leading platforms like Canva, Atlassian, Figma, Notion, and Dropbox have completely transformed the modern workspace. They have brought productivity to new heights and made online collaboration effort...

Castle & Twilio Segment – Instant Account Defense

Securing apps and users from account abuse has long been a resource-draining challenge for security and fraud teams, irrespective of company size. The setup process alone can span months, if not years...