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The N Connector: This piece may be the most difficult to procure, but a good place to start is at a local electronics store, or again from Amazon. The official name for this is "Coaxial Connector, N Type Panel Jack (Square Mtg)"

Once all of these materials have been accumulated, the actual construction can begin. The only real construction that needs to be done is the assembling of the antenna. During this assembly you will need to solder the copper pieces to the N connector and attach the N connector to the copper flashing. This can be done in a few simple steps.

First, you must cut a length of wire measuring 244 mm in length. Then, you will mark the wire every 31 mm so that you will have eight equal segments. You will now begin to bend the wire into a series of 90 degree angles that will end up in the shape of a double diamond. To make really sharp edges, I recommend that you use two pairs of pliers held perpendicular to each other. This way, when they are twisted against each other, you get a very sharp 90 degree angle. The best way to complete the double diamond is to bend it into two equal squares.

The next section is building the mounding element. First, cut out a 110 mm square of black plastic and drill a hole in the center wide enough for the white piece of the N connector to clear. Now you need to solder the copper wire to the N connector. You should fit two pieces of copper wire (length does not matter - they will be cut later anyway) and solder them at two points. The first wire should be directly fitted into the N connector’s gold pin and soldered there. The other wire should be connected just outside the lowest metal ring on the metal panel itself. I recommend you use a propane or butane torch for this part, as a soldering iron does not produce the heat necessary to bond the metals.

After the connector is cooled, attach it to the black plastic base using an epoxy. The copper flashing should be attached to the front and trimmed to fit, also with a hole drilled to allow the N connector to pass through.

The next step is to solder your bow tie shaped element to the vertical wires. I recommend you use two pieces of scrap copper flashing, 15 mm wide to support the double diamond so the height is even on both sides. Then it is the simple task of soldering the wires together.

Next was the task of mounting and attaching the antenna to the dish's antenna. Each satellite antenna differs with make and model but essentially you must remove all the plastic covering pieces so that the receiver’s hole is apparent. Then you must feed the wire through this hole and connect it to the antenna and to the Wi-Fi module. Once this is complete, you are ready for action.

My usage of this module was for penetration testing and that is how I tested this dish's effectiveness. I used the airodump-ng program on my Backtrack 4 Final Virtual Machine and was able to receive a much greater range of Wi-Fi access points. Before, with just the bare module, I would pick up approximately four or five points in my target area. But after I put the dish online, the amount of access points refreshed off the end of my monitor.

Completed antenna module

Completed Satellite Dish

Wireless module

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Securing Online Voting

by kr | 1686 words

Introduction

I work as a programmer in a large company (based in one of the European countries) that provides web support for various online campaigns for big domestic and international companies. We prepare more or less complicated websites, Facebook applications, online forms, etc.

Lately, I got a few assignments to prepare websites for competitions, i.e., an Internet user uploads some image, photo, etc., which is then rated by other people. The entry with the most votes wins, plain and simple. In this article, I will share with you some of my experience on securing (and hacking) such applications.

There are many methods to secure voting applications. None are perfect. Here's a short list. (I didn't elaborate on some of the methods, as you may be familiar with them. If not,