Teknologi 3D Pada Perangkat Telekomunikasi

Saat ini semakin sering orang mendengar kata 3D aka 3 dimensi. Lalu apakah yang terbayang saat anda mendengar kata tsb ?

Saat ini perkembangan 3D sudah merambah ke segala sektor. Bahkan teknologi 3D sudah dibenamkan pada perangkat telekomunikasi macam ponsel, sehingga dimanapun dan kapanpun konsumen dapat menikmati sensasi 3D dengan mudah.

Lalu bagaimana cara kerja nya ? Dilihat dari ensiklopdi, kata 3 dimensi sebenarnya adalah suatu bentuk dari benda yg memiliki panjang,lebar dan tinggi. Sehingga saat tampilan gambar atau video ponsel tersaji pada satu ponsel 3D, suatu gambar/video akan terlihat memiliki kedalaman dan perbedaan ruang antara satu objek dengan objek yg lain.

Berbeda halnya dgn saat anda menonton film, pengguna tidak memerlukan kacamata khusus saat menyaksikan tampilan 3D di ponsel. Hal ini dikarenakan pada ponsel tsb ada cahaya yang mengarahkan sinar merah dan biru ke kedua mata yg berbeda. Cahaya tsb menggantikan fungsi dari kacamata 3D.

Namun teknologi 3D di ponsel juga masih memiliki beberapa kekurangan. Seperti mata cepat lelah saat melihat tampilan 3D atau gambar tidak fokus saat pengguna melihat dari samping.

Semoga sedikit coretan diatas bermanfaat buat rekan2 semua

.:Good Night :.

Read This before Log In

In this oppurtinity, i would like to share just information about sniffing. What is the sniffing ? Sniffing is a method to see the entire package of data passing on a communication medium such as computer connected to the lan, then the packets are reassembled so that the data submitted can be seen by people who do the sniffing.

Sniffing can be done because it is basically an ethernet connection is a connection broadcast, in which all host computers in a network group (eg cafe) will receive packets sent by a host computer.

In this case, how the sniffing is done in social networking applications.

On Mozilla Firefox browser .

On Opera browser .

 

 

 

Interconnection IPv4 and IPv6 with Automatic Mechanism Tunneling

With the development of internet technology is increasingly rapidly causing more and more internet users. But it added the internet user is not matched with the number of IPv4 addresses. So IETF issued a new IP protocol standard called IPng (Internet Protocol Next Generations) or also known as IPv6. IPv6 address format and has a different header with IPv4. So that IPv4 can not directly interconnect with IPv6.  This can cause problems in the implementation of IPv6 in the IPv4 Internet network that has been installed.  As  solution to this problem required an implementation of IPv6 transition mechanism for IPv6.  The aim of making this transition mechanism is so that IPv6 packets can be passed into the existing IPv4 networks or conversely.

Automatic Tunneling Mechanism functioning IPv6 packets pass through IPv4 network which has
there, without changing the IPv4 network infrastructure. Automatic Tunneling mechanism has a working principle encapsulates IPv6 packets with a header IPv4, then the package is immediately sent to the IPv4 network. The function of the encapsulation of IPv6 packets with IPv4 header is for the package can diroutingkan by routers IPv4. However with the addition of the IPv4 header is certainly going to increase in size, according to the packet length IPv4 header length is 20 byte. Accretion this package will also result in increased delay time the main paket. Question shipping of the implementation of IPv6 transition mechanism is the accretion time delay the process due to the length packets, the encapsulation process and the process decapsulation.

Automatic Tunneling Transition Mechanism has advantages :

1. Easier in implementation.
   In the implementation does not require much computer, simply use a computer
   already there. especially for the gateway tunnel, the OS needs to be upgraded to the operating dualstack system which supports IPv6 and IPv4.
2. It’s easier in terms of configuration at the operating system.
   In the configuration script is not needed a complex configuration script, simply by
   tunnel interface configuration and configuration of routing tables only.
3. Does not require a server that serves the transition.
   In the implementation does not require a special server that serves the transition mechanism, encapsulation and decapsulation is done in a tunnel between the gateway and point-to-point.

Weaknesses :

1. Can not be implemented if the client is in transition NAT router.
2. Will cause added delay (processing time).
3. Vulnerable to DDOS attacks.

Vulnerability in uploading photos in the cyber world

New York — For you who often upload photos on the internet, especially Twitter and Facebook started to be careful. Not only the risk of these photos revolved and utilized those irresponsible but your crime will also be lurking.

Because, through these photographs the criminals can know the existence of the virtual world location of the upload. Photographs taken from a camera phone and then instantly shared on Twitter, not only the image information alone, but could not save the information known to the upload.

The Next HOPE hacker conference in New York, a security expert demonstrated how it scans approximately 2.5 million images, spread the link on Twitter. Of that amount, he was able to mention the location coordinates (latitude and longitude) approximately 65 000 photographs, and that’s without known owner of the photo.

“This shows that have failed to safeguard the privacy,” said security expert Ben Jackson Labs as reported by Cnet Mayhemic, Saturday (17/07/2010).

The process of scanning photos to determine the coordinates of the position, made possible when the photo was taken from the phone. The current generation of mobile phone features geotagging photos. Geotagging is a process of geographical identification metadata in a media such as video, photographs, websites, the metadata will have coordinate information.

Hackers are able to inject into the EXIF metadata taken from photo cameras to identify the location. Actually, Twitter and other social networks have service to share locations but most users rarely turn it on. (Ugo)

Reference : google, okezone (techno)