davidad.github.io
Technical JournalThe Internet protocol suite is wonderful, but it was designed before the advent of modern cryptography and without the benefit of hindsight. On the …
http://davidad.github.io/
The Internet protocol suite is wonderful, but it was designed before the advent of modern cryptography and without the benefit of hindsight. On the …
http://davidad.github.io/
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Technical Journal | davidad.github.io Reviews
https://davidad.github.io
The Internet protocol suite is wonderful, but it was designed before the advent of modern cryptography and without the benefit of hindsight. On the …
davidad.github.io
The Security/Product Design Correspondence - Technical Journal
http://davidad.github.io/blog/2014/03/16/infosec-the-product-design-correspondence
The Security/Product Design Correspondence. General disclaimer for InfoSec articles:. Reading this article does not qualify you to design secure systems. Writing this article does not qualify. To design secure systems. In fact,. Nobody is qualified to design secure systems. A system should not be considered secure unless it has been reviewed by multiple security experts. If programming is the art of adding functionality to computers, security is the art of removing it. These are also stories about an ext...
All Boolean functions are polynomials - Technical Journal
http://davidad.github.io/blog/2014/04/14/all-boolean-functions-are-polynomials
All Boolean functions are polynomials. In the integers mod 2 (a.k.a. the finite field of order 2). Multiplication mod 2 is. Adding one mod 2 is. So, multiplication plus one is. Is universal, and any finite composition of polynomials is a polynomial, any finite boolean circuit is a polynomial. Here’s all 16 two-input functions:. Boolean function ( RPN. It’s interesting that in many cases, including those corresponding to the basic functions of. The polynomial bitmap is identical to the lookup table.
Overkilling the 8-queens problem - Technical Journal
http://davidad.github.io/blog/2014/02/25/overkilling-the-8-queens-problem
Overkilling the 8-queens problem. Last night, a fellow Hacker School. Er challenged me to a running-time contest on the classic eight queens puzzle. Naturally, I pulled up my trusty Intel 64 manual. And got to work. It turned out to be even faster than I expected, churning out pretty-printed output in 15ms, which is totally dominated by the time it takes the terminal to display it (it takes only 2ms if redirected to a file). Very slightly more scientific testing. Spurred by curious Hacker News commenters.
Systems Past: the only 8 software innovations we actually use - Technical Journal
http://davidad.github.io/blog/2014/03/12/the-operating-system-is-out-of-date
Systems Past: the only 8 software innovations we actually use. Note: This is a position piece, not a technical article. Hat tip to Jake Skelcy. For requesting such a piece. Computers didn’t always have operating systems. The earliest machines, like the Harvard Mark I. To get the machine cranking again. On the Harvard Mark I, for instance, restarting would involve separately turning on multiple electric motors and then pressing a button marked MAIN SEQUENCE. So to speak). In this essay, I’m going to t...
Concurrency Primitives in Intel 64 Assembly - Technical Journal
http://davidad.github.io/blog/2014/03/23/concurrency-primitives-in-intel-64-assembly
Concurrency Primitives in Intel 64 Assembly. When C was invented. Assembly language, being up to date with the latest CPU capabilities by definition. Should provide the best window into the true nature of today’s concurrency operations. In this post I’m going to walk you through a (relatively) simple concurrent assembly program which runs on OSX or Linux. Here’s the demo ( github. Here, I’m asking. On the second line of. And examine the last 4 lines, just to be sure we understand it correctly:. Notice th...
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Technical Journal
An OSI layer model for the 21st century. And most recently OpenSSL. Which powers most secure servers on the Internet), making the TLS system difficult to trust in practice. What if cryptographic functions were spread out into more layers? Would the stack of layers become too tall, inefficient, and hard to debug, making the problem worse instead of better? LTE), 802.11. WiFi), 802.3. Me your comments or tweet @davidad. And one of which ( Transactions. Is borrowed from database requirements. Read on →.
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davidada28's blog - Blog de davidada28 - Skyrock.com
27/09/2010 at 4:47 PM. 30/04/2011 at 7:59 AM. Subscribe to my blog! Alpha Blondy - Brigadier Sabari. Add this video to my blog. Don't forget that insults, racism, etc. are forbidden by Skyrock's 'General Terms of Use' and that you can be identified by your IP address (66.160.134.4) if someone makes a complaint. Posted on Saturday, 30 April 2011 at 7:59 AM. Alpha Blondy - Jerusalem. Add this video to my blog. Posted on Saturday, 30 April 2011 at 7:51 AM. Add this video to my blog. Add this video to my blog.
Tzionut - ציונות
No dormitará ni se dormirá, el Guardián de Israel (Salmo 121-4) - הנה לא ינום ולא יישן, שומר ישראל -תהלים. Domingo, 15 de mayo de 2011. La verdadera Nakba palestina es el concepto de Libertad. Entre los días 14 y 15 de mayo el mundo árabe recuerda el día de la Nakba. Por ser ésta la fecha, según el calendario gregoriano, cuando tuvo lugar la Independencia del Estado de Israel. Y que conllevó el exilio del pueblo palestino. Añadir que como 'pueblo' el palestino nació en 1967. Peligro para Oriente Medio.
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