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Network Link Conditioner
App developers often forget to test how their apps perform under less-than-ideal networking environments. Learn how you can use the Network Link conditioner to simulate a spotty Internet connection on your device.
Most cited
Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 197 posts.
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Does Apple really log every app you run? A technical look
Apple’s launch of macOS Big Sur was almost immediately followed by server issues which prevented users from running third-party apps on their computers. While a workaround was soon found by people on Twitter, others raised some privacy concerns related to that issue.
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The First Few Milliseconds of an HTTPS Connection (2009)
Convinced from spending hours reading rave reviews, Bob eagerly clicked “Proceed to Checkout” for his gallon of Tuscan Whole Milk and…
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Shortwave Trading: The West Chicago Tower Mystery
Since 2014 this blog has extensively covered the wireless networks built by high-frequency trading (HFT) firms or network providers to reduce latencies between the different exchanges around the wo…
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Why Isn’t Telegram End-to-End Encrypted by Default (2017)
telegra.ph/why-isnt-telegram-end-to-end-encrypted-by-default-08-142021127 points145 commentscited by 11Security & Privacy details
I've been getting this question more often this year. It's based on the wrong assumption that some other popular messaging apps such as WhatsApp are "end-to-end encrypted by default", while Telegram is not. This post is intended to disprove this myth that has been so carefully crafted by Facebook/WhatsApp marketing…
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Mystery signal from a helicopter
I heard a mysterious sound in a Youtube video and started to investigate.
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5G: The outsourced elephant in the room
This article is part of a series on (European) innovation and capabilities. In a break from the usual GPS/Galileo, DNA and C++ posts, here is a bit on 5G and national security. It turns out that through PowerDNS and its parent company Open-Xchange, we know a lot about how large scale European communication service…
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NAT Slipstreaming
exploit NAT/firewalls to access TCP/UDP services bound to any system behind victim's NAT
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HFT in My Backyard
INTRO As soon as the summer sun returns to Belgium, there is a natural human migration from Francophone Wallonia to the west coast sea in the Flemish part of the country. Here, à la mer du Nord, pe…
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The most backdoor-looking bug I’ve ever seen (2021)
This is the story of a bug that was discovered and fixed in Telegram’s self-rolled cryptographic protocol about seven years ago. The bug didn’t get any press, and no one seems to know about it, probably because it was only published in Russian.
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The network is reliable
I’ve been discussing Jepsen and partition tolerance with Peter Bailis over the past few weeks, and I’m honored to present this post as a collaboration between the two of us. We’d also like to extend our sincere appreciation to everyone who contributed their research and experience to this piece.
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The New Normal: 200-400 Gbps DDoS Attacks
Over the past four years, KrebsOnSecurity has been targeted by countless denial-of-service attacks intended to knock it offline. Earlier this week, KrebsOnSecurity was hit by easily the most massive and intense such attack yet — a nearly 200 Gbps assault leveraging a simple attack method that industry experts say is…
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How big brother and big media can put the Internet genie back in the bottle.
The Digital Imprimatur
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Rapid DHCP: Or, how do Macs get on the network so fast?
One of life's minor annoyances is having to wait on my devices to connect to the network after I wake them from sleep. All too often, I'll open the lid on my …
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Taking control of all .io domains with a targeted registration
A Hacker's Blog of Unintended Use and Insomnia.
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Passkeys: A shattered dream
Firstyear's blog
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Endlessh: An SSH Tarpit
This article was discussed on Hacker News ( later ), on reddit ( also ), featured in BSD Now 294 . Also check out this Endlessh analysis .
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Mitigating the Hetzner/Linode XMPP.ru MitM interception incident
(If you just want some recommendations for what to do, skip down to the Recommendations section below .)
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The .ly domain space to be considered unsafe
I would like to warn current and future owners of .ly domains of a concerning incident regarding the deletion of one of our prime domains…
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DNSFS – Store files in others' DNS resolver caches
A while ago I did a blog post about how long DNS resolvers hold results in cache for, using RIPE Atlas probes testing against their default resolvers (in a lot of cases, the DNS cache on their modem/router).
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Why Is This Website Port Scanning Me?
Investigation of the practice of port scanning site visitors for fingerprinting and tracking.
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H.264 is Magic
A high level walkthrough of the basics of video compression techniques used in MPEG, AVC/H.264, codecs.