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: Consider using a "k-Anonymity" model where the user only sends the first 5 characters of a hash to your server, and your server sends back all matching suffixes for the client to check locally. This ensures you never actually see what the user is searching for.

: A single search bar for users to enter a "lookup key" (e.g., email or username). Download 529K Private txt

If you are building a tool to help users check if their information is part of this specific dataset (similar to services like Have I Been Pwned ), 1. Data Processing Pipeline : Consider using a "k-Anonymity" model where the