Pinhole cameras may just be the simplest type of camera ever invented, and they have been around for a long time now. These cameras are used for art, fun, science, and even surveillance. You probably have one, or know someone who does. But have you ever thought about the mechanism behind a pinhole camera?
Not Your Typical Camera
The pinhole camera is not one of the conventional cameras you’re used to in both its form and function. Instead of the typical camera case, a pinhole camera makes use of a light-proof box – matchboxes and cereal boxes will do. And in place of the typical glass lens is a very, very small hole, the size of that created by a pin.
But don’t underestimate this cardboard camera. The fact is the results are impressive and sophisticated works of art. The images you get after exposure is a whole lot better than those you get from a conventional camera. It’s soft, yet crisp at the same time, and the images have an almost infinite depth of field. (more…)
Filed under: Wireless | Tags: Debunking, Insecure, Intrinsically, Legends, Networks, Part, Urban, Wireless
Securing a wireless network is serious business for any IT professional, but how secure do you need to be to truly protect your network from being attacked and ultimately compromised, and which techniques will best afford the desired results? WEP, WPA PSK, WPA Enterprise, WPA2 PSK, WPA2 Enterprise; with all of the wireless security standards and options available and conflicting advice of supposed wireless experts, it’s no wonder confusion reigns supreme resulting in the perpetuation of urban legends. To develop a comprehensive wireless security plan, it is essential to know the facts, so we will first discuss the various wireless security options available.
If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle. – Sun Tzu
Wireless security options
* WEP (Wired Equivalent Privacy) – A deprecated wireless security protocol initially introduced in 1999 to secure 802.11 wireless networks. In 2001, many serious cryptological weaknesses were identified resulting in WEP being compromised within a matter of minutes.
* WPA (WiFI Protected Access) – A wireless security system developed in response to the weaknesses of WEP. WPA was designed to replace WEP while the full security standard (802.11i) was being developed in the form of WPA2. WPA implements the majority of the 802.11i standard and was specifically designed to work with first generation (pre-WPA standard) wireless network interface cards. (more…)
If you are a music buff or simply enjoy music, chances are you are already in possession of some sort of a music system. Gone are the days when we had to laboriously wind up the gramophone or put the needle on the exact spot on the record-player and when we were traveling we had to be content with a good old portable radio. But, with new advances in technology, first came improved versions of the stereo, then the cassette player and now we are simply spoilt for choice because the market is inundated with newer and better audio and stereo products. The mind boggles at the wide array of choices and it can certainly confuse anyone looking to buy the latest equipment.
With shrinking spaces but advancing technology, it is now possible to buy a mini system of stereo and audio device which is also high on quality. If you are living in a small apartment or a dorm room, you might just want a mini system like an iPod or a MP3 player. These can come with speaker docks which you can put up in your rooms or office. The basics of a mini stereo system consist of a stereo receiver and speakers.
Portable CD players, iPods, MP3players have all but replaced the portable radio. Now, no matter where you go, you can always put your mini system in your pocket and be assured of enjoying your favorite music. What a relief especially on mind-numbing long-distance flights! Your morning walks can also be pepped up with music coming into your ears. (more…)
