1. What is compression technique?
The techniques used for data compression is called compression technique. Compression technique is the process of encoding information using fewer bits through use of a specific encoding scheme.
2. Significance of compression techniques in multimedia system
There is much significance of compression techniques in multimedia system. With the techniques we get less disk space for data, faster reading and writing, faster file transfer, variable dynamic range and byte order independence.
3. Coding requirements in compression techniques
The basic coding requirements for compression techniques are storage, throughput and interaction.
Multimedia elements require much more space than text element, for example one second of uncompressed CD quality stereo audio is 176400 bytes and a true color full screen image requires 921600 bytes.
Continuous media requires a large amount of processing power that is throughput like uncompressed CD quality stereo audio stream needs 176400 bytes per second.
Multimedia system requires fast interaction between the sending and receiving ends, thus end to end delay should be small like video conference needs a delay less than 50 ms.
Kerberos Protocol.. A slide on it describing it with few words
Hi all,
I have prepared a short slide on kerberos protocol: what it is and how it works.
lets have a glimps on it..
KERBEROS_Slide
Kerberos slide [ mirror 2 ]
I have prepared a short slide on kerberos protocol: what it is and how it works.
lets have a glimps on it..
KERBEROS_Slide
Kerberos slide [ mirror 2 ]
Man In The Middle (MITM) Attack... In brief
What is a Man In The Middle Attack:
Man in the middle attack is a security attack in which the attacker intercepts and can be able to modify data that is transmitted between two users while the attacker pretends to be the other person to each user.
How this attack takes place:
In this type of attack the attacker intercepts messages in a public key exchange and then retransmits them substituting his own public key for the requested one so that the two original users still appear to be communicating with each other.
An example will make it clearer. Let, there are two parties Alice and Bob and the attacker is Trudy. Now this attack can be taken place in the following way.
Step 1: Alice says I am Alice. Trudy captures this message and passes it to Bob by pretending that this is from Alice.
Man in the middle attack is a security attack in which the attacker intercepts and can be able to modify data that is transmitted between two users while the attacker pretends to be the other person to each user.
How this attack takes place:
In this type of attack the attacker intercepts messages in a public key exchange and then retransmits them substituting his own public key for the requested one so that the two original users still appear to be communicating with each other.
An example will make it clearer. Let, there are two parties Alice and Bob and the attacker is Trudy. Now this attack can be taken place in the following way.
Step 1: Alice says I am Alice. Trudy captures this message and passes it to Bob by pretending that this is from Alice.
Developing j2me application on ubuntu [9.04]
First Install JDK:
To install jdk, open terminal and type those commands
sudo apt-get update
sudo apt-get install sun-java6-jdk
OR,
Application---> Add/Remove application
'Show:ALL available application
Search 'JAVA' Tick and apply
Downlaod Netbeans:
Now go to www.netbeans.org and downlaod the full version of the IDE.
After downloading install it....
Thats it your ide is ready for development.
Then create new project and select J2ME and choose option start developing.
A good emulator:
Download WTK for linux from java.sun.com
Install it..
for installing wtk see this guide.[Click Here]
Now U r ready to rock.....
To install jdk, open terminal and type those commands
sudo apt-get update
sudo apt-get install sun-java6-jdk
OR,
Application---> Add/Remove application
'Show:ALL available application
Search 'JAVA' Tick and apply
Downlaod Netbeans:
Now go to www.netbeans.org and downlaod the full version of the IDE.
After downloading install it....
Thats it your ide is ready for development.
Then create new project and select J2ME and choose option start developing.
A good emulator:
Download WTK for linux from java.sun.com
Install it..
for installing wtk see this guide.[Click Here]
Now U r ready to rock.....
Installing bind9 in ubuntu 9.10
Step 1:
On the terminal the following command was issued,
sudo apt-get install bind9
Step 2:
In this step we have configured the named.conf.local file. Before editing this file we have backed it up by issuing the command,
sudo cp /etc/bind/named.conf.local /etc/bind/named.conf.local.bkup
Then we have edited the file issuing the command
sudo gedit /etc/bind/named.conf.local
After editing the file was like this,
On the terminal the following command was issued,
sudo apt-get install bind9
Step 2:
In this step we have configured the named.conf.local file. Before editing this file we have backed it up by issuing the command,
sudo cp /etc/bind/named.conf.local /etc/bind/named.conf.local.bkup
Then we have edited the file issuing the command
sudo gedit /etc/bind/named.conf.local
After editing the file was like this,
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