Archive for November, 2011
TrueCrypt: A tool to encrypt volumes on-the-fly
November 15th, 2011 | Author: Haider al-Khateeb
TrueCrypt
TrueCrypt is a powerful yet free Open-Source disk encryption Software. I am quite satisfied with the software that I decided to introduce it here in my blog, may all future releases remain free to use!
With TrueCrypt you can maintain an on-the-fly-encrypted volume (data storage device). On their website they explain ‘On-the-fly encryption’ as an automatic continuing encryption process to data right before it is saved and decrypted right after it is loaded. In simple words, you will end up having an encrypted volume to secure all your sensitive data inside. This volume can be mounted and accesses like any regular folder in your system each time you provide the right password and then dismounted to prevent access.
What I personally think makes this software special is the ease of using encrypted files right from the secured volume to the computer’s RAM. As such, if you have a video file, you will not wait until it is fully decrypted to play it, instead the stream will be decrypted right into the RAM while playing, the performance and speed is quite similar to playing any regular video file you have on your system. Brilliant, isn’t it?
Read the rest of this entry »
Posted in 
Configure and use OpenSSH using password-based and/or public & private key pairs between two Linux boxes (Ubuntu and CentOS)
November 12th, 2011 | Author: Haider al-Khateeb
Unlike Telnet, Secure Shell (SSH) encrypts the connection between the remotely connected hosts and doesnt trransfer your password in plain text. As such SSH is more secure and must be used for remote connections. In this post I will install, configure and connect 2 computers running Ubuntu and CentOS. The connection will be tested with a password-based authentication followed by using public and private key pairs to establish trust between the hosts.
To start this trial, install OpenSSH server and client to Ubuntu using:
P.S. make sure you login as root when required.
apt-get install openssh-client apt-get install openssh-server
Tags:
Solving the Fibonacci Rabbit Puzzle using Java
November 8th, 2011 | Author: Haider al-Khateeb
Leonardo Fibonacci was a talented Italian mathematician. He is best known for a number sequence named after him known as the Fibonacci Numbers.
These numbers take the following pattern:
0, 1, 1, 2, 3, 5, 8, 13, 21 …
The series is formed by adding two numbers in the series to generate the third.
The Rabbit Puzzle that Fibonacci investigated in the year 1202 is a great example to introduce you to the significance of the Fibonacci number series. Read the rest of this entry »
