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Guillaume Kuster

@gkuster.com
376 followers 104 following 30 posts

Deputy Director of the Communication and Information Directorate @ French Foreign Office

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Reposted by Guillaume Kuster
AI Forensics @aiforensics.org · 03/12/2025
🚨354 automated AI accounts generated 4.5 billion views on TikTok through more than 43,000 AI-made posts. Our investigation finds Agentic AI Accounts spreading harmful content. Yet TikTok labels around 1.38% of these posts. ⚠️ Full report: tinyurl.com/4kkfm4nn
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 18/07/2025
Today, we are proud to publish our latest investigation into the FSB’s 16th Center, publicly accused of operating some of Russia's most sophisticated cyber-espionage groups. 🔗 checkfirst.network/decoding-se...
Cover of our research "Decoding Secrets With Medals:  How Military Insignia Revealed Russia’s Hidden SIGINT Network"
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Reposted by Guillaume Kuster
Francesco Poldi @noneprivacy.bsky.social · 26/06/2025
📊 Operation Overload on Telegram: • 673 channels analysed • 7M+ messages • 2M+ media collisions (39% of 5.5M total) • 550+ channels share admins • 70% of Overload-linked emails point to Telegram • 10 verified channels drive core narratives
checkfirst.network
Operation Overload: An AI fuelled escalation of the Kremlin-linked propaganda effort - CheckFirst
The Russian propaganda operation targeted at media organisations and fact-checkers is still going strong. Operation Overload, which we first documented in June 2024 is now leveraging AI generated cont...
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 10/06/2025
Today, we're proud to launch RADAR (Regulatory Assessment for Digital Service Act Risks), an open framework that introduces standardised tags for Digital Service Act (DSA) infringements: radar.checkfirst.network/
radar.checkfirst.network
RADAR - Regulatory Assessment for Digital Service Act Risks
RADAR is a framework for assessing and mitigating Digital Service Act (DSA) regulatory risks. Developed by CheckFirst, it guides digital service providers through compliance checkpoints and best practices.
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 18/04/2025
Today, in collaboration with @dfrlab.bsky.social, we pull back the curtain with the #Pravda Dashboard, a live, hour‑by‑hour tracker of #Russia’s Portal Kombat network. Follow each article’s journey, trace domain footprints, spot language‑shifts and watch targeting patterns unfold! portal-kombat.com
portal-kombat.com
Pravda in numbers - Content and Network analysis
Interactive dashboard visualizing patterns, language distribution, domain connections and more across the Pravda Russian network.
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Reposted by Guillaume Kuster
DFRLab @dfrlab.bsky.social · 13/03/2025
NEW 🚨 The #Pravdanetwork—a Russia-linked disinformation operation—has infiltrated #Wikipedia, AI chatbots, and #X, spreading pro-Kremlin narratives globally. @vchatelet.bsky.social & @checkfirst.network reveal the scale of this content pollution: bit.ly/3R6XW9l
bit.ly
Russia-linked Pravda network cited on Wikipedia, LLMs, and X
Pro-Kremlin content pollutes sources on multiple platforms, sparking worries of false claims and sanctioned content reaching global audiences
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 13/03/2025
🚨 NEW REPORT 🔎 The Russian propaganda and disinformation “Pravda” network extended its coverage and aims (and succeeds) at polluting large language models (LLMs) and Wikipedia.  🗒️ X’s Community notes are unable to aptly address the spread of “Pravda” content on the platform.
checkfirst.network
“Pravda” Network: Worldwide Expansion and LLM, Wikipedia Pollution - CheckFirst
CheckFirst, in partnership with DFRLab, shows how the Russian propaganda and disinformation “Pravda” network extended its coverage and aims (and succeeds) at polluting large language models (LLMs) and...
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 24/02/2025
🚨 New report! In collaboration with @dfrlab.bsky.social , we reveal the global expansion of #Russia’s so-called "Portal Kombat" network—an influence operation laundering pro-Kremlin content across Europe, Africa, and Asia. First exposed by @viginum.bsky.social a year ago.
dfrlab.org
Russia’s so-called “Pravda” network expands worldwide
The network formerly known as Portal Kombat added new domains and expanded its geographic reach over the last year
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Guillaume Kuster @gkuster.com · 14/02/2025
À troll, troll et demi.
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 12/02/2025
We're pleased to announce the launch of our new Community Notes Dashboard – a state-of-the-art, interactive platform that delivers deep insights into the evolution and distribution of Community Notes on #X
cn.kaksi.ovh
Community Notes Dashboard | CheckFirst
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Reposted by Guillaume Kuster
Max Bernhard @mxbernhard.bsky.social · 23/01/2025
New: We've uncovered over 100 websites set up by a group known as Storm-1516. After the US elections the Russian influence operation has set its sights on Germany's federal elections. Some of these sites have already been used to attack German politicians. correctiv.org/faktencheck/...
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Guillaume Kuster @gkuster.com · 17/01/2025
nytimes.com
Russian Disinformation Campaigns Eluded Meta’s Efforts to Block Them
A new report details how a covert influence operation linked to the Kremlin continued to place ads on Facebook despite U.S. and E.U. prohibitions on doing business with the organization.
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Guillaume Kuster @gkuster.com · 17/01/2025
This Friday seems to be an SDA day. The G7 Rapid Response Mechanism just posted a statement about the Kremlin funded Social Design Agency we just released a report about. Have a good week end. www.state.gov/office-of-th...
state.gov
Joint Statement by the G7 Rapid Response Mechanism (RRM) on a Russian Influence Campaign - United States Department of State
The text of the following statement was released by the G7 Rapid Response Mechanism, which includes Australia, Canada, France, Germany, Italy, Japan, Netherlands, New Zealand, Sweden, the United Kingd...
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 17/01/2025
Despite international sanctions, #Meta is accepting payments from Russian propagandists. Our latest report with @aiforensics.org & Reset underscore how Meta has failed to moderate over 8,000 political ads from the Kremlin-linked Social Design Agency (SDA). #SDALeak
checkfirst.network
Influence by Design: How Meta Accepted Russian Propaganda Payments Despite Sanctions - CheckFirst
Check First, in partnership with Reset.tech and AI Forensics, unveils the extent to which Kremlin-linked entity SDA have exploited Meta platforms to disseminate propaganda.
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Guillaume Kuster @gkuster.com · 08/01/2025
Kudos to @safety.bsky.app for moderating Operation Overload posts even before they can be shared. The latest email targeting fact-checkers associated with #Overload contained only Bluesky links, none of which linked to content at the time the email was received. Different story on X…
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Reposted by Guillaume Kuster
Alexandre Alaphilippe @aa.disinfo.eu · 07/01/2025
Deepfakes are crazy good these days. I just saw a video of Zuckerberg claiming: - he's "getting rid of fact-checkers" because they "censor" debate - he's "restoring free speech" on Facebook/Instagram - that "Europe is institutionalising censorship" Oh, wait...
facebook.com
542K views · 7K comments | It's time to get back to our roots around free expression. We're replacing fact checkers with Community Notes, simplifying our policies and focusing on... | By Mark Zuckerbe...
It's time to get back to our roots around free expression. We're replacing fact checkers with Community Notes, simplifying our policies and focusing on...
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Guillaume Kuster @gkuster.com · 20/12/2024
Great comments on platform regulation during electoral periods by @vincentcouronne.bsky.social reflecting on the unprecedented Romanian case and the situation outside of the EU, especially in #Africa overcast.fm/+AAycBXDNAFQ (in French)
overcast.fm
Comment réguler les plateformes en période électorale ? — ODIL Le Podcast
Une décision historique. La cour constitutionnelle roumaine a annulé l’élection présidentielle, dont le second tour était prévu le 8 décembre. En cause, l’arrivée en tête du premier tour de Călin Geor...
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Guillaume Kuster @gkuster.com · 12/12/2024
Excellent opinion piece by @marietjeschaake.bsky.social in the @financialtimes.com about the role of platforms in election manipulation. She captures the hopes and fears surrounding the #DSA 's enforcement amid what may be its most significant raison d'être yet. #Romania www.ft.com/content/2855...
ft.com
Romania’s cancelled election is a lesson in social media manipulation
Investigations should finally shed light on how algorithms win votes and influence people
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Guillaume Kuster @gkuster.com · 09/12/2024
If you're short on time to read @checkfirst.network 's research note on Meta's failures to moderate political ads during the Romanian Presidential campaign, here's an excellent wrap-up by @dzuidijk.bsky.social on @bloomberg.com www.bloomberg.com/news/article...
bloomberg.com
Covert Facebook Network Found to Be Targeting Romanian Voters
Meta Platforms Inc. allowed a network of Facebook pages to post more than 4,100 political ads attacking Romania’s pro-EU presidential candidate Elena Lasconi and promoting far-right figures, including...
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Guillaume Kuster @gkuster.com · 09/12/2024
Moderation? What moderation?
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Guillaume Kuster @gkuster.com · 01/12/2024
Data access for researchers (DSA art 40): It’s coming, probably next spring (and also for NGOs). In the meantime here’s a very helpful paper by @jaalbrt.bsky.social to ease your impatience. dsa-observatory.eu/2024/11/29/r...
dsa-observatory.eu
Researcher access to platform data: Experts weigh in on the Delegated Act - DSA Observatory
by John Albert, DSA Observatory This post shares insights from a DSA Observatory workshop held on 18 November 2024, where researchers and legal experts met to discuss what’s new in the draft delegated...
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Guillaume Kuster @gkuster.com · 12/09/2024
Operation #Overload update: Evidence of link to Russia, new targets identified, increased email activity and a shift of narratives towards the U.S. election. Read the latest in our new activity update report: checkfirst.network/operation-ov...
checkfirst.network
Operation Overload: A Growing Disinformation Threat Now Targeting the U.S. Presidential Election - CheckFirst
Continuing the collaboration between Check First and Reset.tech, our latest findings confirm that the operation is based in Russia. We also describe how Operation Overload has now shifted its focus to...
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Guillaume Kuster @gkuster.com · 03/09/2024
@alexjubelin.bsky.social Épisode s’annonçant comme passionnant sur l’incursion ukrainienne à Koursk mais la piètre qualité audio de Vincent Tourret m’a découragé d’aller au bout. Life hack: podcast.adobe.com/enhance
podcast.adobe.com
Enhance Speech from Adobe | Free AI filter for cleaning up spoken audio
This AI audio filter improves spoken audio to make it sound like it was recorded in a soundproofed studio.
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Guillaume Kuster @gkuster.com · 08/07/2024
A great piece by Euronews's The Cube on our and @faktabaari.bsky.social latest report: www.euronews.com/video/2024/0...
euronews.com
Video. TikTok ‘promoted misogyny’ in run-up to European elections
Video. A new study has found that TikTok’s search suggestions contained toxic language towards women and minorities in Finland.
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Guillaume Kuster @gkuster.com · 18/06/2024
Talking more about pro-Russian misinformation operations (Overloads, ads on Meta) in yesterday's @franceculture.bsky.social lunch newscast (in French): www.radiofrance.fr/francecultur...
radiofrance.fr
La campagne éclair du premier tour des législatives a officiellement débuté
Jusqu'à quel point le feuilleton des trahisons et des alliances, à droite comme à gauche est-il de nature à troubler la lisibilité du scrutin ? Et quelles conséquences pourraient avoir le niveau de pa...
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Reposted by Guillaume Kuster
EU DisinfoLab @disinfo.eu · 12/06/2024
Join our next Thursday as we plunge into #OperationOverload, a campaign targeting fact-checkers and researchers worldwide, urging them to verify dubious claims, depleting their resources. 🗓️ 20 June 🕝 14:30 CEST 🦸 @g.checkfirst.network, @checkfirst.network 🔗 us06web.zoom.us/webinar/regi...
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Reposted by Guillaume Kuster
Hervé Letoqueux @herve.checkfirst.network · 10/06/2024
Depuis la fin 2023, VIGINUM observe et documente une campagne malveillante susceptible d’affecter le débat public numérique francophone. Ce mode opératoire, connu en sources ouvertes sous le nom de Matriochka, est actif depuis au moins sept 2023. www.sgdsn.gouv.fr/publications... #Dinsinformation
sgdsn.gouv.fr
Matriochka : une campagne prorusse ciblant les médias et la communauté des fact-checkers | SGDSN
VIGINUM publie un rapport technique sur « Matriochka », une campagne de manipulation de l’information prorusse ciblant les médias et la communauté des fact-checkers.
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Reposted by Guillaume Kuster
European Commission @ec.europa.eu · 07/06/2024
Our Union should never be taken for granted.   Defend it, shape it.     🗳️ Voting booths across the European Union are ready: it is time to #UseYourVote.
A man with a toddler at the voting booth in the NetherlandsA man giving his ID card to a woman at the voting booths in the NetherlandsA woman giving the voting card to a young woman during the early voting in PortugalA woman voting in Ireland
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 05/06/2024
The European Parliament takes a firm stance against disinformation ahead of the elections, expressing significant concerns about many past and ongoing manipulation attempts, including #OperationOverload, which we reported on. Collaboration is key. Our report: checkfirst.network/operation-ov...
europarl.europa.eu
European elections: EU institutions prepared to counter disinformation | News | European Parliament
The EU institutions are playing their part in defending the European elections on 6-9 June against disinformation and information manipulation targeting European democracy.
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 04/06/2024
📢 With the support of Reset & 20+ fact-checking organisations, we unveil "Operation Overload". It is a sophisticated, cross-country disinformation campaign orchestrated to disseminate pro-Russian propaganda in the West. Find out more about #OperationOverload ⤵️
checkfirst.network
Operation Overload: how pro-Russian actors flood newsrooms with fake content and seek to divert their efforts - CheckFirst
“Please Check”. More that 800 organisations, among which many media outlets have been flooded with emails and social media mentions urging them to verify dubious claims undermining Ukraine, France and...
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Guillaume Kuster @gkuster.com · 30/04/2024
Necessary action. In just two hours yesterday we uncovered another flurry of fraudulent scam ads on Facebook, having reached >3M users. checkfirst.network/facebook-hus...
checkfirst.network
Facebook Hustles (continued): European Commission cracks down on Meta for letting fraudulent ads through - CheckFirst
We welcome the action from the European Commission to open formal proceedings into Meta's Facebook and Instagram over suspected breaches of the Digital Services Act (DSA). Last June, we revealed how n...
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Reposted by Guillaume Kuster
Alexandra Geese @alexandrageese.eurosky.social · 17/04/2024
New report out by Mozilla and @checkfirst.network : Big tech ad #transparency databases under the #DSA have major gaps & are unreliable. We need standardisation for repositories - the EU Commission can & should issue guidelines! @thierrybreton.bsky.social foundation.mozilla.org/en/research/...
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Reposted by Guillaume Kuster
Mathilde Saliou @mathildesaliou.com · 17/04/2024
Exclu Next : selon une nouvelle étude d'AI Forensics, Meta échoue à modérer correctement ses publicités, notamment politiques, quand bien même les élections européennes approchent. next.ink/134519/elect...
next.ink
Élections européennes : Meta échoue à modérer des publicités de propagande pro-russe - Next
[Exclusivité Next] Une nouvelle étude d’AI Forensics illustre la faiblesse de la modération des publicités politiques réalisée par Meta, et la manière dont des réseaux d’influence pro-russe en tirent ...
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 04/04/2024
🗣️"We are facing image manipulations that are more plausible than ever". Our CEO @g.checkfirst.network was interviewed by Les Vérificateurs on French TV channel LCI. The video is available here ⤵️
tf1info.fr
VIDÉO - Chronique les Vérificateurs : de mystérieux graffitis anti-Zelensky en Europe ? | TF1 INFO
[VIDÉO] Retrouvez la chronique de Samira El Gadir, tous les jeudis dans
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Reposted by Guillaume Kuster
Alexandre Alaphilippe @aa.disinfo.eu · 26/03/2024
Fascinante plongée dans les arcanes de l’arnaque, aux confins du cybercrime et de la désinformation. Un grand coup de chapeau à @checkfirst.network qui avait déjà exposé cette opération dans Facebook Hustle.
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CheckFirst @checkfirst.network · 22/03/2024
The cat and mouse game is not efficient enough. Checkfirst's @g.checkfirst.network on @france24.bsky.social talked about digital threats on EU elections. He discussed #FacebookHustles and #UpNextReport, reminding that Youtube favored far-right content during the Finnish Presidential race.
france24.com
Ici l'Europe - Menace sur les élections européennes : l'UE cible d'intox et de cyberattaques
L'hémicycle européen craint d’être la cible d’opérations de désinformation et de cyberattaques à l’approche des élections européennes, en juin prochain. En pleine guerre en Ukraine, la Russie intensif...
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Guillaume Kuster @gkuster.com · 15/03/2024
Ole hyvä! Thanks to you for giving us the floor and letting us share our findings with the community. We need more adversarial research. Read the entire report: crossover.social/finnish-far-...
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Reposted by Guillaume Kuster
EU DisinfoLab @disinfo.eu · 12/03/2024
Join us as @g.checkfirst.network presents @checkfirst.network & @faktabaari.bsky.social 's analysis on the far right's social media presence during the recent Finnish presidential elections. Register👇 us06web.zoom.us/webinar/regi...
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 29/02/2024
🇫🇮 On Wednesday, our CEO @g.checkfirst.network st.network met with Věra Jourová, Vice-President of the European Commission, presenting key lessons from our CrossOver project in Finland with @faktabaari.bsky.social. 📷 Alessandro Rampazzo/Copyright: European Union, 2024/EC - Audiovisual Service
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 28/02/2024
Join our CEO, @g.checkfirst.network alongside @aa.disinfo.eu from @disinfo.eu for an eye-opening webinar revealing the key learnings from our latest CrossOver iteration in Finland with the amazing team at @faktabaari.bsky.social. 🗓️ Save the date: March 14th, 2:30 PM (Paris time)
disinfo.eu
Far from fair – how the Finnish far-right took the spotlight on social media ahead of the presidential election - EU DisinfoLab
Our webinar on 14 March, featuring Guillaume Kuster, CEO of Check First, offers an in-depth analysis of the Finnish far right's presence and visibility on social media platforms in the lead-up to the ...
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Guillaume Kuster @gkuster.com · 21/02/2024
Même technique que celle identifiée dans notre enquête Facebook Hustles, autre victime. checkfirst.network/facebook-hus...
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Guillaume Kuster @gkuster.com · 25/01/2024
Oh. francetvinfo.fr down
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Reposted by Guillaume Kuster
CheckFirst @checkfirst.network · 24/01/2024
Excited to share that our CrossOver Finland project with @faktabaari.bsky.social is spotlighted in a Logically Facts article! 🎉 Don't miss out – make sure to give it a read!
logicallyfacts.com
In the eye of the storm: Safeguarding the Finnish election in a turbulent security environment
Logically Facts looks at the Finnish misinformation landscape ahead of elections.
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Guillaume Kuster @gkuster.com · 25/01/2024
Finding #1 “A monitoring system so extensive that it generates overlap is a must.” dfrlab.org/2024/01/24/h... via @terryzim.bsky.social
dfrlab.org
How Ukraine fights Russian disinformation: Beehive vs mammoth
What Ukrainian practitioners can teach us about countering Russian disinformation, propaganda and information aggression
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Guillaume Kuster @gkuster.com · 13/12/2023
Nice episode of le Soir’s podcast with @philaloux.bsky.social about our latest study. www.lesoir.be/555064/artic...
lesoir.be
Comment les algorithmes d’Amazon recommandent de la désinformation en masse
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Guillaume Kuster @gkuster.com · 11/12/2023
When Amazon book stores recommended anti-vaccination, harmful content and let users access pornographic content without control. Our latest study together with @aiforensics.bsky.social is up (and Le Monde read it) www.lemonde.fr/pixels/artic...
lemonde.fr
Dans la librairie d’Amazon, « les algorithmes façonnent les ventes, mais aussi le discours publ...
Dans une étude parue lundi, AI Forensics et Check First mettent en lumière la façon dont Amazon surexpose des ouvrages trompeurs ou controversés dans ses rayons en lignes.
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Guillaume Kuster @gkuster.com · 04/12/2023
Welcoming @mikkovsalo.bsky.social and here! Always great to see talents from @faktabaari.bsky.social enrich the conversation 🫶
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Guillaume Kuster @gkuster.com · 30/11/2023
Western-Balkan’s governments are showing a strong interest in the DSA, media regulation, and European Media Literacy practices in a context of high sensitivity to FiMi. Looking forward to @al.checkfirst.network ‘s talk later today on the protection of the information environment at EU-WB conference.
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Pixels | Le Monde @pixelsfr.bsky.social · 29/11/2023
Les ministères sommés de « remplacer » leurs messageries instantanées par l’application française Olvid
lemonde.fr
Les ministères sommés de « remplacer » leurs messageries instantanées par l’application fra...
Les services d’Elisabeth Borne ont donné jusqu’au 8 décembre aux ministres pour installer l’application Olvid, et ne plus utiliser les principales applications « grand public » (WhatsApp,...
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