kwantam

14 ms·

61.
by kwantam 10y ago
It's clear that a lot of thought went into this write-up, but this is not a design that I would use or recommend. (Because you probably don't anything about me: I have background in both circuit design and applied crypto, and I ha
62.
Cypherpunks mailing list to shut down(cpunks.org)
5 points by kwantam 10y ago|0 comments
63.
DDoSCoin: Cryptocurrency with malicious proof of work(usenix.org)
153 points by kwantam 10y ago|37 comments
64.
by kwantam 11y ago
A "simple" memory layout for cache friendliness (assuming you don't have to do updates on your tree; there exists a more complicated cache-friendly dynamic tree structure, too) is a recursive van Emde Boas layout. This memory
65.
by kwantam 11y ago
It seems reasonable that if a person wants to donate to charity, that person might also want to expend some mental energy to optimize the way in which she does so. For example, if I know that I can afford to give only $5 to charity, it does
66.
by kwantam 11y ago
Interesting. There seem to be conflicting opinions here. Referring again to Blonder[0], it seems that one can improve smoke absorption by mopping consistently. Personally, I'm usually pretty aggressive with the mopping, that is, every
67.
by kwantam 11y ago
I wonder if they used the "Texas Crutch," i.e., wrapped the brisket in foil after ~4 hours. The upshot of the Texas Crutch technique is: after about 2 hours on the smoke, the internal temperature of a brisket will plateau for 6-8
68.
by kwantam 12y ago
If you enjoyed this blog post, you'll find the Frink author's own examples at least as entertaining: https://futureboy.us/frinkdocs/#SampleCalculations
69.
by kwantam 12y ago
Further, that section seems to imply that Crossley was convinced from the beginning that the story was fake. "...he accused me of being 18 years old with no job, right off the bat..." It's interesting that he calls out Crossl
70.
by kwantam 12y ago
No it hasn't. AC transmission is nice for a few reasons, but the biggest reason for its use historically historically has been that you can step down from high to low voltage with a passive element (a transformer). (Why step up and dow
71.
by kwantam 12y ago
No, it doesn't. "The decisions" refers to those that the design/product team made (see paragraph preceding the GP's quote)---the same changes that were made and roundly panned by Googlers. Inbox, on the other hand,
72.
Addition chains (2012)(strangelyconsistent.org)
16 points by kwantam 12y ago|0 comments
73.
by kwantam 12y ago
From a brief glance over their publications, the answer seems to be no. I base this claim on a few heuristics: 1. That's clearly not a goal of their research (they discuss using their ORAM and Ostructures in the context of trusted proc
74.
by kwantam 12y ago
This talk mostly relates to the NSA's presumed poisoning of NIST SP 800-90A Dual-EC PRNG. Previously it had been asserted that generating backdoored parameters was extremely hard. Green et al have an accompanying paper at USENIX Securi
75.
by kwantam 12y ago
Until recently, almost all bond wires were made of gold. This is because low temperature ultrasonic welding can be done reliably between gold and aluminum, and because gold and aluminum are ductile enough that they act as a cushion during t
76.
Pessimal Algorithms and Simplexity Analysis (1984) [pdf](cs.uiuc.edu)
4 points by kwantam 12y ago|0 comments
77.
by kwantam 12y ago
The peripherals you list span a wide range of complexity. GPIO, I2C, and SD interfaces (in approximately increasing order of complexity from my point of view) are one-person jobs for the right person. I've been in charge of all the G
78.
by kwantam 12y ago
See my comments below. The only error is that the OP reversed the symbol for the battery. Look at the breadboard; he/she built it with the power supply correctly installed. You're probably right about the datasheet for the opto, b
79.
by kwantam 12y ago
Ah, I see the confusion. The power supply should be connected such that the positive terminal is on the left. If you look at the breadboard, you can see that this is, in fact, what's built. My description of the circuit's operatio
80.
by kwantam 12y ago
Looks correct to me. The idea is to trigger in the absence of the laser---i.e., when the beam is broken by a projectile. When the laser shines on the base of the phototransistor, the transistor pulls current from the node between the two
81.
by kwantam 12y ago
You can destructure without moving, as you suggest, by taking a reference. Move: let x = (box 2u, box 4u); let (y, z) = match x { (first, second) => (first, second) }; println!("x is {}", x); &#x2F
82.
Bot of the Cloth: A Flexible CNC Machine(corexy.com)
1 points by kwantam 12y ago|0 comments
83.
Oneshallpass: A little self-contained web-page for making secure Web passwords(github.com)
1 points by kwantam 12y ago|0 comments
84.
by kwantam 13y ago
Context: This discussion originated on the emacs-devel mailing list, where there was a discussion of adding code to company-mode (text completion) explicitly supporting Clang [1]. It was pointed out [2] that RMS has in the past shown a disi
85.
The Halting Problem Implies Perceived Free Will, Even In Deterministic Universes(medium.com)
1 points by kwantam 13y ago|0 comments
86.
by kwantam 13y ago
You've been talking to the wrong hardware engineers, I think. Every engineer on my team has a characteristic "fudge factor" that represents his... optimism (say, from 1.5x to 2.5x). Once I apply those fudge factors, I add an
87.
by kwantam 13y ago
But there is a technical justification for making both changes at once. Specifically, there is worry that removing GCJ and associated test suite will exercise fewer code paths in the collection, and the claim is that adding go will cover on
88.
by kwantam 13y ago
Note that there are tests that would catch this, but Intel specifically chooses not to test the hardware RNG using them, according to the paper. (This is ostensibly to guard against attacks on the RNG using scan mode. That could very well
89.
by kwantam 13y ago
The original article, which this (kind of) summarizes: "Reflections on Trusting Trust" by Ken Thompson. http://cm.bell-labs.com/who/ken/trust.html Sort of disappointing that the blog entry doesn't b
90.
by kwantam 13y ago
One obvious advantage is that it's cheap enough to use as-is. One of the things that keeps me from caring much about Arduino is that it's too expensive to use for anything but experimentation: if I'm building more than a one-

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