Stefan Frei
@stefanfrei.bsky.social
Cyber security expert, pentester, speaker & tech enthusiast. Tame complexity 4 security. Alum RWRI-13, @Accenture, @Swisscom, @Secunia, NSS Labs, ISS X-Force https://techzoom.net
Seen that, been there. Will add quantum to my slide
November 10, 2025 at 5:47 PM
Seen that, been there. Will add quantum to my slide
Die Schweiz nimmt das ernst mit Drohnenschutz Gitter, historische Lokomotiven zuerst …
Was kommt als Nächstes? 🤔
Was kommt als Nächstes? 🤔
October 30, 2025 at 6:58 PM
Die Schweiz nimmt das ernst mit Drohnenschutz Gitter, historische Lokomotiven zuerst …
Was kommt als Nächstes? 🤔
Was kommt als Nächstes? 🤔
RayHunter GSM IMSI catcher catcher records quite a bit of activity here at ETH in Zurich City
www.eff.org/deeplinks/20...
www.eff.org/deeplinks/20...
October 23, 2025 at 11:14 AM
RayHunter GSM IMSI catcher catcher records quite a bit of activity here at ETH in Zurich City
www.eff.org/deeplinks/20...
www.eff.org/deeplinks/20...
I have nothing to hide, I have nothing of valure - therefore I am not a target.
My reply:
My reply:
October 22, 2025 at 10:24 PM
I have nothing to hide, I have nothing of valure - therefore I am not a target.
My reply:
My reply:
Danke für den Tipp und die Validierung der Site
October 9, 2025 at 6:21 PM
Danke für den Tipp und die Validierung der Site
Machine learning ..
September 15, 2025 at 8:44 AM
Machine learning ..
No, I am not in Texas
July 26, 2025 at 3:15 PM
No, I am not in Texas
Stromausfall in ZH, eine Mitteilung auf Alertswiss wäre hilfreich
May 22, 2025 at 4:24 PM
Stromausfall in ZH, eine Mitteilung auf Alertswiss wäre hilfreich
Stromausfall am Bellvue Zürich, alles steht / fast alles dunkel
May 22, 2025 at 4:19 PM
Stromausfall am Bellvue Zürich, alles steht / fast alles dunkel
Gave a talk at OECD on vulnerability markets. What could possibly go wrong with these incentives?
November 14, 2024 at 5:23 PM
Gave a talk at OECD on vulnerability markets. What could possibly go wrong with these incentives?
Ready for my trip to Paris tomorrow to present at the OECD Working Party on Digital Security (WPDS) meeting. I will make the case for establishing a nation-wide bug bounty program. #bugbounty
November 13, 2024 at 8:57 PM
Ready for my trip to Paris tomorrow to present at the OECD Working Party on Digital Security (WPDS) meeting. I will make the case for establishing a nation-wide bug bounty program. #bugbounty
Polar lights in Zurich area
October 10, 2024 at 10:16 PM
Polar lights in Zurich area
Timeline from new technology to enforceable safety standards
October 1, 2024 at 5:18 PM
Timeline from new technology to enforceable safety standards
Neulich im Warteraum der Zürichseefähre …
September 7, 2024 at 7:30 PM
Neulich im Warteraum der Zürichseefähre …
Achtung: SBB SwissPass Phishing Attacke
Ich habe mal mitgespielt und eine Disposable CreditCard angegeben, innert Minuten zwei Transaktionsversuche:
1. Versuch www.cartlow.com (Elektronik Shop): AED 4'521 .-
2. Versuch tix.nl (Reiseportal): EUR 796.-
Ich habe mal mitgespielt und eine Disposable CreditCard angegeben, innert Minuten zwei Transaktionsversuche:
1. Versuch www.cartlow.com (Elektronik Shop): AED 4'521 .-
2. Versuch tix.nl (Reiseportal): EUR 796.-
March 15, 2024 at 5:26 PM
Achtung: SBB SwissPass Phishing Attacke
Ich habe mal mitgespielt und eine Disposable CreditCard angegeben, innert Minuten zwei Transaktionsversuche:
1. Versuch www.cartlow.com (Elektronik Shop): AED 4'521 .-
2. Versuch tix.nl (Reiseportal): EUR 796.-
Ich habe mal mitgespielt und eine Disposable CreditCard angegeben, innert Minuten zwei Transaktionsversuche:
1. Versuch www.cartlow.com (Elektronik Shop): AED 4'521 .-
2. Versuch tix.nl (Reiseportal): EUR 796.-
I just returned from 2 days of intensive training bypassing Bitlocker with hardware attack by @evilmaid.bsky.social
Disassemble notebook, identify and solder wires to TPM chip, sniffing signals with logic analyser to finally intercept the Bitlocker key.
1/2
Disassemble notebook, identify and solder wires to TPM chip, sniffing signals with logic analyser to finally intercept the Bitlocker key.
1/2
January 25, 2024 at 8:51 PM
I just returned from 2 days of intensive training bypassing Bitlocker with hardware attack by @evilmaid.bsky.social
Disassemble notebook, identify and solder wires to TPM chip, sniffing signals with logic analyser to finally intercept the Bitlocker key.
1/2
Disassemble notebook, identify and solder wires to TPM chip, sniffing signals with logic analyser to finally intercept the Bitlocker key.
1/2
Bitlocker Bypass Training getting serious
January 24, 2024 at 8:29 AM
Bitlocker Bypass Training getting serious
Now I know why my old iPhone refused to serve any longer as monitoring cam. Slowly the expanding battery broke even the glass
January 12, 2024 at 10:08 PM
Now I know why my old iPhone refused to serve any longer as monitoring cam. Slowly the expanding battery broke even the glass
The upcoming GraySky app promises translation feature graysky.app
October 19, 2023 at 4:33 PM
The upcoming GraySky app promises translation feature graysky.app