Lukasz Olejnik (@lukOlejnik) / X

Lukasz Olejnik

20.9K posts

Lukasz Olejnik

@lukOlejnik

Security & Privacy. Data Protection. Research & Development. Engineering. Analyst. Policy. W3C. Consultant. Author. [email protected] Ph.D, LL.M. @warstudies

Brussels / London / EU

lukaszolejnik.com

Joined March 2013

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Lukasz Olejnik
@lukOlejnik
Jan 15
Exploring new engagements (cyber risk, security, data protection). Reviews, GRC, regulatory, standards work. I translate regulations & standards into practical requirements for product and engineering, and review designs and implementations to confirm compliance. 1/2
Lukasz Olejnik
@lukOlejnik
Aug 12, 2025
Chinese scientists have developed the best shortest-path algorithm in 41 years! A team from Tsinghua University has broken Dijkstra’s “sorting barrier” — the first improvement since 1984. The new algorithm runs in O(m \log^{2/3} n) time. Potential applications? Faster shorter
Lukasz Olejnik
@lukOlejnik
May 11, 2025
BREAKING: Polish Prime Minister Tusk announced full certainty that the massive fire at Marywilska 44, a major wholesale center in Warsaw, was arson ordered by Russian intelligence. The attack was coordinated by someone in Russia; some suspects are in custody, others identified. A
Lukasz Olejnik
@lukOlejnik
Mar 9, 2025
Russian SIGINT/SATING station in Vienna is doing something very interesting! Vienna’s SIGINT/SATCOM station is intercepting C-band communications from Eutelsat 3B, Eutelsat 10B, SES-5, and Rascom QAF1, satellites covering Africa and connecting to UN offices, embassies, oil
Lukasz Olejnik
@lukOlejnik
Dec 6, 2023
They HACKED A TRAIN. For real. Train operators asked for this to see why their trains didn't run after servicing. Turns out that vendor/producer implemented a geofence lock for trains serviced somewhere else. Amazing story, one of the best hacks in 2023. social.hackerspace.pl/@q3k/111528165…
Lukasz Olejnik
@lukOlejnik
Mar 5, 2025
Chinese Great Firewall (website access blockade and. content filter for internet traffic) was leaking data! It's a fascinating discovery of security and privacy vulnerability in a large-scale technical censorship system. "Traffic with no relation to China could be leaked".
Lukasz Olejnik
@lukOlejnik
Oct 20, 2025
Signal is also down due to Amazon AWS outage. So yeah, secure and private communication is also dependent on reliable infrastructure.
Lukasz Olejnik
@lukOlejnik
Feb 13, 2018
Wow. France wants to make private companies liable for security defects in products. After end of of support - to make source code available. France will take the discussion on the international level.
Lukasz Olejnik
@lukOlejnik
Sep 10, 2021
It turns out that wireless charging leaks private data. It leaks information about websites visited by the user. " allows accurate website fingerprinting on a charging smartphone". Information leaked depends on the battery level. Cool work! #GDPR #ePrivacy arxiv.org/pdf/2105.12266…
Lukasz Olejnik
@lukOlejnik
Jul 31, 2024
Apple introduces homomorphic encryption via Swift. A cryptographic technique that enables computations to be done on encrypted data without revealing the underlying unencrypted data in th process. For example during cloud computations. In short, the building blocks of
Lukasz Olejnik
@lukOlejnik
Sep 24, 2025
They also likely used a computer.
Lukasz Olejnik
@lukOlejnik
Oct 15, 2025
Your cybersecurity expert tells you to use two-factor authentication? And they’re right. But until recently, any Android app could steal it just by scanning what’s on your screen. 🤣
Lukasz Olejnik
@lukOlejnik
Nov 13, 2025
CHINESE HACKERS USED CLAUDE FOR NEARLY-AUTONOMOUS CYBERATTACKS! AI-based espionage campaign by Chinese state-sponsored group. AI handled 80–90% of operations: reconnaissance, vulnerability discovery, exploitation, credential harvesting, lateral movement and data exfiltration. It
Lukasz Olejnik
@lukOlejnik
Aug 16, 2022
Emojis can be used to deliver malicious payloads (i.e. to hack systems). Clever. î.fr/defcon/DEF%20C…