Originally published at htpbe.tech. The version on htpbe.tech stays in sync with the latest detection algorithm — refer to it for the canonical text.
Every month we look at aggregate, anonymized data from checks processed through the HTPBE? web interface and publish what we find. No file contents, no personally identifiable information — only the structural and metadata signals our algorithm uses to detect modifications.
March 2026: 866 PDFs analyzed through the website, 31 calendar days, and a pace that was more than twice February's.
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