background preloader

The First Few Milliseconds of an HTTPS Connection

The First Few Milliseconds of an HTTPS Connection
Convinced from spending hours reading rave reviews, Bob eagerly clicked “Proceed to Checkout” for his gallon of Tuscan Whole Milk and… Whoa! What just happened? In the 220 milliseconds that flew by, a lot of interesting stuff happened to make Firefox change the address bar color and put a lock in the lower right corner. With the help of Wireshark, my favorite network tool, and a slightly modified debug build of Firefox, we can see exactly what’s going on. By agreement of RFC 2818, Firefox knew that “https” meant it should connect to port 443 at Most people associate HTTPS with SSL (Secure Sockets Layer) which was created by Netscape in the mid 90’s. Client Hello TLS wraps all traffic in “records” of different types. The next two bytes are 0x0301 which indicate that this is a version 3.1 record which shows that TLS 1.0 is essentially SSL 3.1. The handshake record is broken out into several messages. Server Hello Checking out the Certificate Why should we trust this certificate?

Main Page - APIDesign Algorithm Design DJ Helper Home Page undefined Table of contents What is this? Features Detailed description Installation / Requirements Download Tutorial - How to set up double WinAmps Tutorial - How to do instant switches Tutorial - Beatmixing for everyone Tutorial - Using the "Metronome" method Tutorial - Organizing your songs Additional hints License, Copyright & contact information The DJ Helper is a plugin for WinAmp, the "ultimate high-fidelity music player for Windows". The DJ Helper gives WinAmp more features than professional DJ-type CD players that cost $500 or more. Using the DJ Helper and a standard PC with two soundcards, you can master performances like a pro DJ, with unprecedented ease. New in version 2.5: New look, with WinAmp-like colors (at last...). New in version 2.5: Automatic volume control. New in version 2.5: Automatic BPM counting. New in version 2.5: Playing status indicator (Playing/Paused/Cued, etc). New in version 2.2: Three independent Cue Points, all of them savable. Temporary pitch bend by +/- 3%.

The Real Meaning of Model-Driven Architecture Leading-Edge JavaThe Real Meaning of Model-Driven ArchitectureAn Interview with No Magic from JavaOne 2007by Bill Venners with Frank SommersJune 27, 2007 Summary In this interview with Artima, Andrius Strazdauskas, Gary Duncanson, and Daniel Brookshier of No Magic discuss the goals of Model Driven Architecture, or MDA, and explain why they think it can improve programmer productivity and software quality. In this interview, I discuss Model-Driven Architecture, or MDA, with Andrius Strazdauskas, R&D Manager, Gary Duncanson, President and CEO, and Daniel Brookshier, Chief Architect of No Magic. Prior to this interview my understanding was that MDA was an attempt to program in pictures or diagrams, and I was skeptical. However, as I spoke with No Magic, I kept recognizing in their MDA tool many of the same characteristics that we built into our "little languages" and code generators in Artima's web architecture. Post your opinion in the discussion forum.

The Basics of C Programming" The C programming language is a popular and widely used programming language for creating computer programs. Programmers around the world embrace C because it gives maximum control and efficiency to the programmer. If you are a programmer, or if you are interested in becoming a programmer, there are a couple of benefits you gain from learning C: You will be able to read and write code for a large number of platforms -- everything from microcontrollers to the most advanced scientific systems can be written in C, and many modern operating systems are written in C.The jump to the object oriented C++ language becomes much easier. In this article, we will walk through the entire language and show you how to become a C programmer, starting at the beginning.

Scopa (Kartenspiel) Scopa (italienisch für Besen) ist ein beliebtes italienisches Kartenspiel. Gespielt wird üblicherweise mit einem eigenen Deck, den sogenannten napoletanischen Karten (carte napoletane). Im Handel sind diese Karten auch unter der Bezeichnung Piacentine 109 zu beziehen. Meistens wird zu zweit gespielt. Jedoch existieren eine Menge Spielvarianten, die sich in Spieleranzahl, Zählweisen, Regeln und verwendeten Karten unterscheiden können. Napoletanische Karten Das Spiel besitzt 40 Karten in vier Farben. denari - Gold, dargestellt als Münzen (auch Sonnen genannt)bastoni - Stäbecoppe - Kelchespade - Schwerter In allen Farben laufen die Werte der Karten von eins bis zehn, wobei das Ass die Eins ist mit jeweils nur einem abgebildeten Gegenstand, die Karten Zwei bis Sieben zeigen dementsprechend die jeweilige Anzahl an Gegenständen. Ein Spiel setzt sich aus mehreren Runden zusammen. Es gibt je einen Punkt für eine scopa. Außerdem gibt es jeweils genau einen Punkt für den Spieler oder die Partei

The Programmers’ Stone Programming, Motherfucker - Do you speak it? Lady Blackbird: Adventures in the Wild Blue Yonder Lady Blackbird is on the run from an arranged marriage to Count Carlowe. She hired a smuggler skyship, The Owl, to take her from her palace on the Imperial world of Ilysium to the far reaches of the Remnants, so she could be with her once secret lover: the pirate king Uriah Flint. HOWEVER, just before reaching the halfway point of Haven, The Owl was pursued and captured by the Imperial cruiser Hand of Sorrow, under charges of flying a false flag. EVEN NOW, Lady Blackbird, her bodyguard, and the crew of The Owl are detained in the brig, while the Imperial commander runs the smuggler ship’s registry over the wireless. It’s only a matter of time before they discover the outstanding warrants and learn that The Owl is owned by none other than the infamous outcast, Cyrus Vance. How will Lady Blackbird and the others escape the Hand of Sorrow? What dangers lie in their path? Will they be able to find the secret lair of the pirate king? Go. Dokumentacje - Wiedza - Technologie Top 10 Ways to be Screwed by "C" To get on this list, a bug has to be able to cause at least half a day of futile head scratching, and has to be aggravated by the poor design of the "C" language. In the interests of equal time, and to see how the world has progressed in the 20-odd years since "C" escaped from its spawning ground, see my Top 10 Ways to be Screwed by the Java programming language, and for more general ways to waste a lot of time due to bad software, try my Adventures in Hell page. A better language would allow fallible programmers to be more productive. Infallible programmers, of the type unix' and "C" designers anticipated, need read no further. In fairness, I have to admit that the writers of compilers have improved on the situation in recent years, by detecting and warning about potentially bad code in many cases. Non-terminated comment, "accidentally" terminated by some subsequent comment, with the code in between swallowed. a=b; /* this is a bug c=d; /* c=d will never happen */ Or consider this: or as

Link Shell Extension Unroll follows Outer Junctions/Symlink Directories and rebuilds the content of Outer Junctions/Symlink Directories inside the hierarchy at the destination location. Unroll also applies to Outer Symlink Files, which means, that unroll causes the target of Outer Symlink Files to be copied to the destination location. In the above example Folder1 is copied to Destination/Folder1, and Outer Junction/Symlink and all the files/directories below Outer Junction/Symlink Target are copied to the folder Outer Junction/Symlink in the destination. The objective behind unrolling Outer Junctions/Symlink Directories is to get everything with which the source is connected and rebuild it as seperate copy in the destination. It resembles the 'hair of the elephant' pattern: Pull on a hair of an elephant, and get the whole elephant. Unroll is the default behaviour for Smart Copy, Smart Mirror, Delorean Copy and Clone. Advanced thoughts on Unrolling This kind of nesting can be much more complex:

Top 10 Secure Coding Practices Top 10 Secure Coding Practices Validate input. Validate input from all untrusted data sources. Proper input validation can eliminate the vast majority of software vulnerabilities. Bonus Secure Coding Practices Define security requirements. Bonus Photograph I found the following photograph on the Web, and I'm still trying to figure out who owns the rights to it. I like this photograph because it illustrates how the easiest way to break system security is often to circumvent it rather than defeat it (as is the case with most software vulnerabilities related to insecure coding practices). References [Saltzer 74] Saltzer, J. [Saltzer 75] Saltzer, J. [Seacord 05] Seacord, R. [Swiderski 04] Swiderski, F. & Snyder, W.

Linux Directory Structure (File System Structure) Explained with Examples by Ramesh Natarajan on September 8, 2010 Have you wondered why certain programs are located under /bin, or /sbin, or /usr/bin, or /usr/sbin? For example, less command is located under /usr/bin directory. Why not /bin, or /sbin, or /usr/sbin? In this article, let us review the Linux filesystem structures and understand the meaning of individual high-level directories. 1. / – Root Every single file and directory starts from the root directory.Only root user has write privilege under this directory.Please note that /root is root user’s home directory, which is not same as /. 2. Contains binary executables.Common linux commands you need to use in single-user modes are located under this directory.Commands used by all the users of the system are located here.For example: ps, ls, ping, grep, cp. 3. 4. Contains configuration files required by all programs.This also contains startup and shutdown shell scripts used to start/stop individual programs.For example: /etc/resolv.conf, /etc/logrotate.conf