https://henriksb.com/cyber_hacking/Recent content in Cybersecurity & Systems on Henrik Selje BygnesHugo -- gohugo.ioenhenriksb@pm.me (Henrik Selje Bygnes)henriksb@pm.me (Henrik Selje Bygnes)Copyright 2026 Henrik Selje BygnesFri, 24 Jul 2026 00:00:00 +0000https://henriksb.com/cyber_hacking/credit_card_security/Tue, 15 Aug 2023 00:00:00 +0000henriksb@pm.me (Henrik Selje Bygnes)https://henriksb.com/cyber_hacking/credit_card_security/A defensive guide to how credit-card fraud works in practice: leaked numbers, social media exposure, NFC myths, physical theft, dark-web resale, and realistic protection.https://henriksb.com/cyber_hacking/file-spoofing/Wed, 15 Aug 2018 00:00:00 +0000henriksb@pm.me (Henrik Selje Bygnes)https://henriksb.com/cyber_hacking/file-spoofing/A practical look at RTLO, shortcuts, misleading extensions, NTFS streams, archives, and polyglots through the thing they all exploit: disagreement about what a file actually is.