Sniffing is the nastiest trick in the bag of people who want to harm you
[image: Sniff it out]
*Sniffing<http://search.live.com/results.aspx?q=Sniffing+implies+the+use+of+a+network+to+access+data&go=Search&form=QBRE>
*implies the use of a network to access data that is not intended for that
person. A packet sniffer is a software program or a hardware device that can
"listen in on" and track the data going in and out on a particular network.
It lets hackers figure out where the information came from, where it will
go, and what it contains, giving them a complete picture of your network
setup. Unlike similar acts of deceit carried out on the Net, though, like
sending spam mails, phishing, the use of keyloggers, etc, sniffing is not
all bad. It has its legitimate uses.
For example, packet sniffers are used by network administrators to test
firewalls and troubleshoot network issues. A network analyser also comes in
handy when diagnosing network troubles.
But the technology is only as good as the people using it - so sniffing can
also be used for malicious purposes. And it has certainly picked up in the
frequency of use over the last couple of years.
Programs and devices with this capability can be used to get hold of
username and password data, read other people's e-mail, access documents,
etc. What is worse, data gathered in this manner can further be used to
carry out planned attacks on unsuspecting victims.
Primarily, sniffing is used to gain access to two kinds of data: passwords,
or financial data. Most users need to enter a password at least once or
twice a day. Often, we think that because it is password-protected, our data
is safe. But this is not so.
The other thing that gets stolen most often is financial information.
Everybody feels a little twang of anxiety when they enter their credit card
information into a website. Now imagine, if somebody could access that
credit card information freely? Enough to set your pulse racing? Hackers can
use sniffing devices along with other malicious software, in order to keep
the host machine from noticing the intrusion.
Several sniffing tools are freely available on the Internet. Most often,
sniffers are deployed when you access a website that contains malware. Email
and instant messaging are other methods used to launch such attacks.
You can never be sure if a computer on the Internet is sniffing out
information in your home or workplace network. You can protect yourself
against sniffing through data encryption. Instant messengers, email, Web
pages and most other programs send information in the plain text format. But
if you don't want people get to your data, you should visit only those
websites that are Secure Sockets Layer (SSL) protected, or are protected
using other tools.
You can also encrypt your passwords, email messages and chat sessions. There
are many user-friendly programs available on the Internet that let you
encrypt your data. Download and install one of these to protect yourself.
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