Ephemeral IDs: Cloudflare's Latest Tool for Fraud Detection
Briefly

Ephemeral IDs enable detection of fraudulent activity by linking user behavior to a specific client, rather than relying solely on IP addresses, making it harder for attackers.
With Ephemeral IDs, legitimate account creation processes can be monitored in real-time, allowing teams to set alerts and investigate unusual trends in account activity.
Read at InfoQ
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