PseudoDNA: Identifying Critical Vulnerabilities in Microsoft’s PhotoDNA https://alecmuffett.com/article/151219 #OnlineSafetyAct #PhotoDna #censorship

PseudoDNA: Identifying Critica...
PseudoDNA: Identifying Critical Vulnerabilities in Microsoft’s PhotoDNA

Researchers from the COSIC group at KU Leuven have uncovered major security weaknesses in PhotoDNA, a technology widely used to detect Child Sexual Abuse Material (CSAM) online. The system is curre…

Dropsafe
PseudoDNA: Identifying Critical Vulnerabilities in Microsoft’s PhotoDNA
https://alecmuffett.com/article/151219
#OnlineSafetyAct #PhotoDna #censorship
PseudoDNA: Identifying Critical Vulnerabilities in Microsoft’s PhotoDNA

Researchers from the COSIC group at KU Leuven have uncovered major security weaknesses in PhotoDNA, a technology widely used to detect Child Sexual Abuse Material (CSAM) online. The system is curre…

Dropsafe

PseudoDNA: Identifying Critical Vulnerabilities in Microsoft’s PhotoDNA

Researchers from the COSIC group at KU Leuven have uncovered major security weaknesses in PhotoDNA, a technology widely used to detect Child Sexual Abuse Material (CSAM) online. The system is currently used by major platforms including Google, Instagram, TikTok, Facebook, and Microsoft, and is deployed at a global scale.

https://www.pseudodna.eu/

#censorship #onlineSafetyAct #photoDna
PseudoDNA: Critical Vulnerabilities in Microsoft’s PhotoDNA

Researchers reveal major security weaknesses in PhotoDNA, a system widely used to detect CSAM globally.

“Natural collisions in Apple’s NeuralHash & Microsoft’s PhotoDNA show worrying false positives/negatives in widely deployed perceptual hashing” https://alecmuffett.com/article/151208 #NeuralHash #OnlineSafetyAct #PhotoDna #censorship

“Natural collisions in Apple’s...
“Natural collisions in Apple’s NeuralHash & Microsoft’s PhotoDNA show worrying false positives/negatives in widely deployed perceptual hashing”

At Facebook 2013-16 it was a discreet secret within parts of the Trust & Safety team that PhotoDNA “had problems with collisions but we are not allowed to talk about them” – d…

Dropsafe
“Natural collisions in Apple’s NeuralHash & Microsoft’s PhotoDNA show worrying false positives/negatives in widely deployed perceptual hashing”
https://alecmuffett.com/article/151208
#NeuralHash #OnlineSafetyAct #PhotoDna #censorship
“Natural collisions in Apple’s NeuralHash & Microsoft’s PhotoDNA show worrying false positives/negatives in widely deployed perceptual hashing”

At Facebook 2013-16 it was a discreet secret within parts of the Trust & Safety team that PhotoDNA “had problems with collisions but we are not allowed to talk about them” – d…

Dropsafe

“Natural collisions in Apple’s NeuralHash & Microsoft’s PhotoDNA show worrying false positives/negatives in widely deployed perceptual hashing”

At Facebook 2013-16 it was a discreet secret within parts of the Trust & Safety team that PhotoDNA “had problems with collisions but we are not allowed to talk about them” – discussion prevented by Microsoft license terms but also because criticising any “child safety” technology was an industry taboo.

I’m glad this is coming out now:

https://twitter.com/CosicBe/status/2036017010488832122?s=20

#censorship #neuralHash #onlineSafetyAct #photoDna
Cosic.be (@CosicBe) on X

Natural collisions in Apple’s #NeuralHash and Microsoft’s #PhotoDNA show worrying false positives/negatives in widely deployed perceptual hashing. Our findings highlight severe risks for privacy and civil liberties at scale. Watch this short demo: 🎥 https://t.co/bWxVTKlZEC

X (formerly Twitter)
New Le Soir piece on COSIC research: we reverse‑engineered Microsoft’s secret #PhotoDNA and show how #CSAM detection can be bypassed or weaponised to falsely flag innocents. Our results challenge the push for large‑scale client‑side scanning.
https://www.lesoir.be/735999/article/2026-03-21/le-systeme-mondial-de-detection-dimages-pedopornographiques-en-ligne-est-boiteux [paywall]
Le système mondial de détection d’images pédopornographiques en ligne est boiteux

Des chercheurs de la KULeuven ont percé l’algorithme ultrasecret de PhotoDNA, la technologie de Microsoft utilisée par toutes les plateformes pour débusquer les pédocriminels. Quelques secondes suffisent pour le contourner. Ou accuser des innocents.

Le Soir
Natural collisions in Apple’s #NeuralHash and Microsoft’s #PhotoDNA show worrying false positives/negatives in widely deployed perceptual hashing. Our findings highlight severe risks for privacy and civil liberties at scale. Watch this short demo:
🎥 https://www.youtube.com/watch?v=KYyDwKLSKgM
Cybersecurity Industry Day 2025 - Your Face Isn’t Yours Anymore... (Diane Leblanc-Albarel, COSIC)

YouTube

Des chercheurs de la #KULeuven ont percé l’algorithme ultrasecret de #PhotoDNA, la technologie de #Microsoft utilisée par toutes les plateformes pour débusquer les pédocriminels. Quelques secondes suffisent pour le contourner. Ou accuser des innocents.

https://www.lesoir.be/735999/article/2026-03-21/le-systeme-mondial-de-detection-dimages-pedopornographiques-en-ligne-est-boiteux

https://eprint.iacr.org/2026/486.pdf

Le système mondial de détection d’images pédopornographiques en ligne est boiteux

Des chercheurs de la KULeuven ont percé l’algorithme ultrasecret de PhotoDNA, la technologie de Microsoft utilisée par toutes les plateformes pour débusquer les pédocriminels. Quelques secondes suffisent pour le contourner. Ou accuser des innocents.

Le Soir

RE: https://digitalcourage.social/@echo_pbreyer/116243150550107300

Our #PhotoDNA robustness study features in today’s discussion on large‑scale scanning technologies.
Science matters.
🔗 https://www.patrick-breyer.de/en/end-of-chat-control-paving-the-way-for-genuine-child-protection/