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Lance Kenji Parce

Lance Kenji Parce

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ProtonMail

OSINT Industries – Holehe & The Secret Email

March 12, 2026February 28, 2026 by mis4nthr0pia

Challenge Overview This challenge focuses on uncovering the origins of the OSINT tool “Holehe”, specifically tracing back the first public appearance and creation date of the creator’s email address. Behind every OSINT tool is a developer, and behind that developer is usually a publicly exposed email. The task is to identify: Only the date is … Read more

Categories CTF Writeups Tags Email Metadata, GitHub, Holehe, Open Source Intelligence, OSINT, OSINT Industries, PGP, ProtonMail, Public Email, Unix Timestamp

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