601
How Apple Pay works and why it matters for developers
A blog for third-party developers on the Clover POS platform.
New
The latest blog posts to take off on Hacker News. 1,981 posts.
602
Build a browser engine part 5: Box model and layout tree
This is the latest in a series of articles about writing a simple HTML rendering engine:
603
604
605
606
Building Pulse and Bloom, an interactive biofeedback installation at Burning Man
Samuel Clay is a grad student in the schools of design and of engineering at Harvard. He founded NewsBlur , a personal RSS news reader, and Turn Touch , beautiful control for the smart home.
607
608
A shallow survey of formal methods for C code
Two interesting things in formally verified software happened recently. The big one was the release of SeL4 - a formally verified L4 microkernel. The second was much smaller, but closer to my usual scope: a paper which showed the correctness of sections of a couple of the assembly implementations of Curve25519.
609
Correlation is usually not causation. But why not?
Correlations are oft interpreted as evidence for causation; this is oft falsified; do causal graphs explain why this is so common, because the number of possible indirect paths greatly exceeds the direct paths necessary for useful manipulation?
610
611
Notes on XKCD's “Pixels”
Max Goodhart's personal journal and sketchbook.
612
Modernizing “less”
I have just spent an all-nighter doing something I didn't expect to do. I've " modernized " less (1). (That link is to the changeset.) ...
613
Why I like Common Lisp
In a recent email exchange discussion, Charlotte Herzeel gave a summary of Common Lisp that I believe is worth repeating publicly. With her ...
614
Bypassing a Python sandbox by abusing code objects
Awhile ago, I stumbled upon a service that let you write python-bots to interact with a number of external services. The basic idea was th...
615
Lessons I learned from the failure of my first startup, Dinnr
(Background: Dinnr was an ad-hoc, same day ingredient delivery service. Select a recipe on our website, and we deliver everything you need…
616
IPv6 privacy addresses crashed the MIT CSAIL network
A few hours ago, I sent the following “dear colleagues” email (lightly edited to remove some private details) to all my users at work: This has been a very trying week. For those of you…
617
Reverse engineering a counterfeit 7805 voltage regulator
Update: It turns out my 7805 isn't counterfeit. eclectro did an in-depth search ( details on reddit ) and found an old 7805 datasheet fro...
618
619
If you want to start a startup, go work for someone else
When you look online for advice about entrepreneurship, you will see a lot of "just do it": The best way to get experience... is to start ...
620
Zeroing buffers is insufficient
With a bit of care and a cooperative compiler, we can zero a buffer — but that's not what we need. What we need to do is zero every location where sensitive data might be stored. Remember, the whole reason we had sensitive information in memory in the first place was so that we could use it; and that usage almost…
621
Recommended Security Reading
dfir.org is the personal page of Andrew Case ( @attrc ). This website serves as a central location for all of my research, software projects, and speaking events.
622
I Am an Indie iOS Developer – Part 2
I develop apps for iOS
623
624
AM – Attribute Modules for CSS
A few months ago, I read an article by Harry Roberts where he introduced an interesting concept for working with related classes in CSS. In his article, he describes the use of the [] characters in class attributes to help understand their purpose at a quick glance. He presents this example, arguing that it makes the…
625
DPI Calculator / PPI Calculator
Noteworthy display sizes of monitors, PCs, notebooks, tablets, smartphones, smartwatches and HMDs. Link background color takes into account typical viewing distance:
626
A Funny Thing Happened on the Way to Coursera
I’m excited to be teaching Stanford Law’s first Coursera offering this fall, on government surveillance . In preparation, I’ve been extensively poking around the platform; while I found some snazzy features, I also stumbled across a few security and privacy issues.
627
Standard Markdown Is Now Common Markdown
Let me open with an apology to John Gruber for my previous blog post. We’ve been working on the Standard Markdown project for about two years now. We invited John Gruber, the original creator of Markdown, to join the project via email in November 2012, but never heard back.
628
629
How to zero a buffer
Now, we don't want to truly change the observable behaviour of our software — but fortunately the C standard has a more liberal concept of "observable" than most people. In particular, the C standard states that the observable behaviour includes accesses to volatile objects . What is a volatile object, you ask? It is…
630
Nearly All U.S. Home Depot Stores Hit By Credit Card Theft
New data gathered from the cybercrime underground suggests that the apparent credit and debit card breach at Home Depot involves nearly all of the company’s stores across the nation.