Ephemeral IDs: a new tool for fraud detection (cloudflare.com)
In the early days of the Internet, a single IP address was a reliable indicator of a single user. However, today’s Internet is more complex. Shared IP addresses are now common, with users connecting via mobile IP address pools, VPNs, or behind CGNAT (Carrier Grade Network Address Translation). This makes relying on IP addresses alone a weak method to combat modern threats like automated attacks and fraudulent activity.