Three weeks ago I was benchmarking GPT-4o against a local Llama model. I was copying prompts from a real support ticket database to make the test realistic. Midway through the run I glanced at the terminal and saw this in the logs: prompt = "Hi, my name is Sarah Johnson, my account number is 45...

Source: [Dev.to](https://dev.to/sochaty/i-built-a-pii-firewall-for-llms-in-a-weekend-and-caught-my-own-leak-1mh0)

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