Georgios Kontaxis @k0ntax1s
Ph.D. in Computer Science. Security and Privacy. (On Mastodon: @[email protected]) cs.columbia.edu/~kontaxis/ Columbia University, NYC Joined June 2012-
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Inflight wifi didn't work so of course I had to debug it. It appears the problem is lack of DHCP lease. The WiFi was using 8 hour leases, which was time enough for many planeloads of passengers to embark/disembark. A quick ARP scan at the time showed there were 55 devices on the network, almost entirely mobile devices (which randomize their MAC addresses, whereas laptops don't). Given the number of takeoffs and landings in the 8 hour period, the lease table can easily fill up. The fun fact about DHCP is that when this condition happens, it sends no response to the client. In other words, when trying to diagnose why " the wifi isn't working", there's no difference between this cause and half a dozen other causes. I have to guess this is the cause simply by looking at the fact lots of other people seem to have successfully gotten a DHCP response but I haven't. I told the flight attendant "the WiFi isn't working". She then "reset the Internet", after which I could get a lease. Apparently in the front near the entrance/exit, there's a button simply labeled "INTERNET RESET" that she presses whenever a customer complains. Obviously, one solution to the problem is that DHCP leases on planes should be drastically shorter, like at 1 hour intervals. Secondly, the number of leases should be drastically increased.
SMTP Smuggling - Spoofing E-Mails Worldwide sec-consult.com/blog/detail/sm…
Today @FTC took action against Rite Aid for recklessly using facial recognition tools, leading to innocent people being wrongly accused of shoplifting. Our order prohibits the firm from using facial surveillance tools for 5 years, among other protections. ftc.gov/news-events/ne…
The full text of "Firewalls and Internet Security, Second Edition”, by Bill Cheswick, Avi Rubin, and myself, has been released under a Creative Commons license at wilyhacker.com. We include the full LaTeX source of the book, since we typeset it ourselves.
Framing Frames: Bypassing Wi-Fi Encryption by Manipulating Transmit Queues papers.mathyvanhoef.com/usenix2023-wif…
Messaging Layer Security: Secure and Usable End-to-End Encryption ietf.org/blog/mls-secur…
OpenSSL support for RFC7250 raw public keys has been merged into the 3.2 development branch (master): github.com/openssl/openss… This supports trust validation via DANE TLSA records! I have pre-release code that adds DANE-with-RPK support to Postfix: github.com/vdukhovni/post…
Zoom and dark patterns. Click a meeting link. It auto-downloads Zoom. Ignore that. The 'launch meeting' page gives no indication that you can join via browser but suggests install the Zoom Client. Click 'launch meeting' & you get the choice to 'Join from your Browser'.
From the TLS newsletter: Mike Malone wrote a blog post about using short-lived certificates to avoid having to deal with revocation. buff.ly/3Jn8QUg
When can two TCP sockets share a local address? blog.cloudflare.com/the-quantum-st… @jkbs0 did a cool investigation on when bind-before-connect can reuse local port occupied by connect() and vice-versa. The results will shock you! :)
📢Our work on automated discovery of memory safety vulnerabilities in DL frameworks has been accepted at @USENIXSecurity 2023! Jointly with @neochristou @di_jin42 @Vatlidak @baishakhir | arxiv.org/abs/2209.14921 | gitlab.com/brown-ssl/ivys… | 39 CVEs 😎🤘💣#ivysyn #brownssl #usesec23
Really excited to see Google doing OHTTP with Fastly. My sources tell me it only took Fastly 45 minutes to build this. Amazing! Awesome to see this technology being used in the wild. Next up, OHTTP for DNS. developer.chrome.com/blog/oblivious…
I'm very excited about the types of things OHTTP infrastructure will enable, so it's great to see it deployed in practice. e.g., I could imagine collecting signals of page breakage from tracking protection.
Really excited to see Google doing OHTTP with Fastly. My sources tell me it only took Fastly 45 minutes to build this. Amazing! Awesome to see this technology being used in the wild. Next up, OHTTP for DNS. developer.chrome.com/blog/oblivious…
Google Chrome - Partnering with Fastly—Oblivious HTTP relay for FLEDGE 𝑘-anonymity server developer.chrome.com/blog/oblivious…
MVP?
Windows 98 Setup
Let’s move the web PKI forward - together. chromium.org/Home/chromium-…
Lemmings (1991)
That brings up the question of what should be revoked? For ages, I have been saying revocation reasons don't make sense in the WebPKI. Well Mozilla agreed and has worked on defining those reasons better blog.mozilla.org/security/2022/…
Well this is not awesome. @Raspberry_Pi Camera v3 produces RF EMI on the GPS L1 frequency when enabled. Enough to make a GPS receiver maybe 20cm away from the camera cable drop lock. Camera v2 doesn't do this.
Carl Dong → obscura... @carl_dong
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klarname, MSc @klarnameMSc
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Vaibhav Sharma @vbsharma
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Computers @Computers_MDPI
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rakib @rakib062
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handongxue @likev
5K Followers 5K Following after 80'/气象工作者/不苟同/关注天气变化/向往自由/热爱科学、互联网、编程 Node.js Web C++ Julia Python
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Fox @BlackHoleFox
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Mahesh M @learn_2_grow
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Penguin in the Alps @objetsfabuleux
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S @pwnsdx
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Market IKR @MarketIkr
447 Followers 2K Following MarketIKR. We change the game! #Cozmo Wheel Caps available from link in bio.
Travis Monson @TravisM_CyberSN
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Heather Goodnight @HBREssential
134 Followers 2K Following entrepreneur and executive leader with more than a Decade of experience in Information Security, Application Risk Management and Quantitative Risk Analysis.
निर्मोह... @nirmohi_bhor
1 Followers 343 Following नवेला।। खाओ और डकार लो।। तांडवहारी गांधीवादी।। .ti edoced u nehw ti tog u
Luiza Jarovsky, PhD @LuizaJarovsky
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Alvaro Bedoya @BedoyaUSA
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Lina Khan @linamkhan
146K Followers 731 Following Served as 57th Chair of the Federal Trade Commission. Retweets, Follows, & Likes ≠ Endorsements.
Erica Bunnies & Puppi... @ohemorange
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antirez @antirez
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Sarah Tucker @sjtucker13
395 Followers 777 Following Marine microbial ecology, PhD🦠🧬 Post-doc @MBLscience in the Meren Lab, she/her
Privacy Matters @PrivacyMatters
41K Followers 2K Following Pat Walshe. Interested in how the processing of data about people, impacts their fundamental rights & freedoms
Adrián Granados @adriangranados
4K Followers 412 Following Co-founder @intuitibits | Maker of @wifiexplorer | @wlanpi Core Dev | 🛜
Feisty Duck @feistyduck
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Gabriel Weinberg @yegg
120K Followers 6 Following Founder, DuckDuckGo. Co-author, Traction. Co-author, Super Thinking. Writing personally at https://t.co/19vKxkTW2X. Tweets auto-delete via TweetDelete.
Retro Tech Dreams @RetroTechDreams
214K Followers 285 Following Retro tech, early web & vintage computing. 80s, 90s, 2000s nostalgia. Follow for daily posts.
Mike McQuaid @MikeMcQuaid
9K Followers 0 Following CTPO, Project Leader of @MacHomebrew, maintainer since 2009 Posting automated from https://t.co/FBnFkSYLoE If you want me to read your reply: email me instead.
Ryan Hurst @rmhrisk
6K Followers 3K Following Dropout. Father. I build things. Security, Cryptography, Engineering, Entrepreneurship. @peculiarventure + xMSFT + xGOOG ++. also on https://t.co/FaDXJfnZBm & Bluesky
Julien Vanegue @jvanegue
6K Followers 984 Following CTO Office / Head of Infra & Security Research @Bloomberg. Interested in mathematical techniques for software, systems, and network analysis at world scale.
Breaking Aviation New... @aviationbrk
277K Followers 233 Following Breaking aviation news and top videos/photos from the @aviationbrk team. All photos/videos credited if source known, ***DM for correction/removal*** ✈️
The New York Times @nytimes
53.5M Followers 846 Following News tips? Share them here: https://t.co/ghL9OoYKMM
The FAA ✈️ @FAANews
534K Followers 2K Following Official account of the Federal Aviation Administration. Following, mention or RP does not mean endorsement.
evan j @ejcx_
9K Followers 1K Following 👾👾 Co-Founder of @RunReveal . 🐄🐄 JMU Double Duke. There's always more to learn.
Troy Hunt @troyhunt
248K Followers 1K Following Creator of @haveibeenpwned. Microsoft Regional Director. Pluralsight author. Online security, technology and “The Cloud”. Australian.
Andy Yen @andyyen
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Davide Balzarotti @balzarot
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Lucas Pardue @SimmerVigor
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Artur Janc @arturjanc
2K Followers 347 Following Making the web platform more secure and private, and managing part of @Google's Information Security Engineering team in my spare time.
Robert J. Hansen @robertjhansen
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Ben Adida @benadida
8K Followers 3K Following Building a voting system everyone can trust @voting_works. Past: Prod/Eng/Sec @Clever, @Square, @Mozilla, ..., Harvard, MIT. Mastodon: @[email protected]
Matthew Prince 🌥 @eastdakota
222K Followers 301 Following A little bit geek, wonk, and nerd. Repeat entrepreneur, recovering lawyer, and former ski instructor. Co-founder & CEO of Cloudflare (NYSE: NET).
Casey Newton @CaseyNewton
210K Followers 984 Following Writing @platformer. Co-hosting Hard Fork @nytimes. Posting good tweets to Instagram stories @crumbler. [email protected] | https://t.co/9KuJb8XCrr
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2K Followers 1 Following Protocol designer, trail runner Blog: https://t.co/wJzXSZuYjw Newsletter: https://t.co/0rlUOwNnQO If you like this stuff, please tell others.
Ian Petchenik @petchmo
11K Followers 871 Following Communications @Flightradar24, co-host AvTalk podcast w/@AirlineFlyer, AvGeek. Air-ride equipped.
Joanna Stern @JoannaStern
184K Followers 3K Following 📚 "I AM NOT A ROBOT" out May 12 (@harpercollins) 👩🏻💻 Chief of everything, The New Things 📺 Chief tech analyst @nbcnews 🏆 Emmy winner + mom
Flightradar24 @flightradar24
1.8M Followers 650 Following Track air traffic in real time from all around the world! Apps: https://t.co/AnZhJUIrBg | FAQ: https://t.co/WkTgAaePHs | Support: https://t.co/BomORktp7R
HTTP Shaming @HTTPshaming
764 Followers 0 Following (Nicely) shaming websites and apps that don't encrypt user data in transit – by @webster
Encrypted DNS Deploym... @EncryptedDNS
215 Followers 0 Following We're banding together to deploy encrypted DNS standards on a global basis, improving privacy & security while preserving the distributed architecture of DNS.
Ehsan Akhgari @ehsanakhgari
2K Followers 1K Following post-training @fal, ex research @playground_ai, ex browser maker, @mightyapp @mozilla; to live is to grow
Erik also @erik@nygre... @akanygren
963 Followers 2K Following Internet Systems Architect, Maker, Father, Husband, tinkerer, IPv6 evangelist, and wanna-be mad scientist. Deals with complex systems. He/Him. Tweets my own.
RFC Bot @rfcbot
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40 Followers 36 Following
Root zone changes @diffroot
691 Followers 155 Following Unofficial automated notices of root DNS zone changes excluding glue records, maintained by @fanf
DNS-OARC @dnsoarc
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