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The Most Abandoned Books on GoodReads (2019)
Which books on GoodReads are most difficult to finish? Estimating proportions in December 2019 gives an entirely different result than absolute counts.
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 49,218 posts.
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Against risk-based authentication (or, why I wouldn't trust Google Cloud)
If you were deciding on whether to use AWS, Azure or Google Cloud for a production application, what factors would you use to make the decision? There are probably many such factors you might think of, but I'd like to point out one that probably isn't commonly considered: the relative trustworthiness of Google's…
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European Union dedicated questionnaire on the Encryption of Data
On both sides of Atlantic the debate around strong cryptography frequently resurfaces. Proponents of weakening cryptography or introduction of backdoors (or "golden keys") cite national security. Technologists and activists oppose such proposals, citing freedoms and cybersecurity. Regulating cryptography is of course…
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When to Rewrite from Scratch – Autopsy of Failed Software
A case study of rewriting software system from scratch and why it failed.
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Evolving Floorplans
Evolving Floorplans - 2017.
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Microsoft confirms Exchange Year 2022 problem
[German]Exchange servers (on-premises) have had woldwide a Year 2022 problem since January 1 (00:00 UTC), because mails are no longer transported due to a “date error”. Meanwhile…
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My VM is lighter and safer than your container
My VM is lighter (and safer) than your container Manco et al., SOSP’17 Can we have the improved isolation of VMs, with the efficiency of containers? In today’s paper choice the authors investigate …
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When ‘he’ll be kept on payroll, somewhere’ is where you are
On August 31, 2015, I started a Ph.D. in cryptography at TU Eindhoven, working with Tanja Lange and Dan Bernstein. On December 2, 2016, I…
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A treasury of Zork maps
Yesterday a Reddit link started going around the IF circles: "Wait," I thought, "haven't I seen that map before?" No, I had not. But I sort of had? Then I looked through my collection of Zork maps. Then I realized, oh no, I have a collection ...
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Cancellations in async Rust
Correctness in the face of cancellations: a written version of my talk at RustConf 2025.
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3px of padding makes all the difference in the world
I'm sorry for rageskitching about Facebook, but I can't help it. I've seen this bug too many times and I would really like someone with commit access to the Facebook CSS to fix it. ...
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Wikivoyage has disappeared from DuckDuckGo
Update (2021-10-31): DuckDuckGo now includes results for Wikivoyage again, as do Bing and Yahoo. I have been planning a long due vacation and I was doing some research into the places I wanted to visit. My goto travel guide is Wikivoyage: it’s well organised, text-heavy (instead of slideshow-heavy alternatives) and…
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Lost in Math
Sabine Hossenfelder’s new book Lost in Math should be starting to appear in bookstores around now. It’s very good and you should get a copy. I hope that the book will receive a lot of a…
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Compressing Icelandic name declension patterns into a 3.27 kB trie
How I used a compressed trie data structure to encode Icelandic declension data.
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How to Hire
After startups raise money, their next biggest problem becomes hiring. It turns out it’s both really hard and really important to hire good people; in fact, it’s probably the most important thing...
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ssh whoami.filippo.io
I updated the whoami.filippo.io dataset! I explain how it works, and how I fetched the new data.
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Web Scraping 101 with Python
A beginner's guide to getting started with web scraping using Python and BeautifulSoup.
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Bloom Filters
The original motivation for the creation of Bloom filters is efficient set membership, using a probabilistic approach to significantly reduce the time and space required to reject items that are not members in a certain set.
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Fixing QuickLook (2023)
How I Still Use Flash in 2022
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Examining ARM vs. x86 Memory Models with Rust
With Apple’s recent announcement that they are moving away from Intel X86 CPU’s to their own ARM CPU’s for future laptops and desktops I thought it would be a good time to take a look at the some differences that can affect systems programmers working in Rust.
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Xerox Alto zero-day: cracking disk password protection on a 45 year old system
We've been archiving a bunch of old Xerox Alto disk packs from the 1970s. A few of them turned out to be password-protected, so I needed ...
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Google's CardDAV server isn't standards compliant (2014)
For fruux , we’ve decided to implement syncing with Google Contacts some time ago, allowing people to do bi-directional sync between their fruux and Google Contacts address book.