Category: Internet Stuff

Internet updates, reviews and technology

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Keeping Things Private – Stripping JPEG Metadata

There are more things than we know that can be revealed by your JPEG EXIF metadata such as the type of camera you use, aperture settings, the type of focus, lens type and even the location of the picture taken that might compromise the privacy of the persons or locations depicted in the photograph.

Mypapit EXIF data gnome

One of the things that we can do to is to strip away the information from JPEG files before uploading them to the internet, by using exiftool or jhead.

Exiftool
Install libimage-exiftool-perl
sudo apt-get install libimage-exiftool-perl

and by running the command
exiftool -all= *.jpg

jhead
Install jhead package:
sudo apt-get install jhead

and by running the command
jhead -purejpg /path/to/*.jpg

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Video: Cracking Wifi WEP Keys using Backtrack 4 and aircrack-ng

Here’s a video showing you how to crack Wireless WEP keys using Backtrack 4 and aircrack-ng.

Additionally, you need a compatible wireless adapter or compatible wireless chipset which can be used with aircrack-ng.

Here are the list of the best wireless cards to use(according to aircrack-ng wiki):

Good luck!

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How to setup Secure Webserver HTTPS (SSL) on Apache in Ubuntu

Secure HTTP (SSL/TLS) has become a must if you are planning to setup a website which includes user authentication (ie. login box) or sensitive data. HTTPS prevents the sensitive data from being transfered across the network in clear text where it is susceptible to being sniffed or altered. Here is the tutorial on how to setup a secure HTTP on Apache web server in Ubuntu 10.04 (Lucid Lynx).

What do you need?

  • apache2 (Web Server)
  • openssl
  • A bit patient, because it will take some time to learn

Step 1: Create a self-signed certificate
You need to create a self-signed certificate with openssl. To do that you will need to generate the server key.


openssl genrsa -des3 -out server-sec.key 4096

…and certificate signing request (CSR)


openssl req -new -key server-sec.key -out server.csr

After that, generate the server certificate by signing it with the server key.

openssl x509 -req -days 365 -in server.csr -signkey server-sec.key -out server.crt

Keep the server-sec.key in a secure location, with read/write permission assigned only to root. Then generate a password-less copy of the key for Apache use.

openssl rsa -in server-sec.key -out server.key

By this time, you should have :

  • server.key (passwordless key for Apache)
  • server.csr (certificate signing request)
  • server.crt (certificate)
  • server-sec.key (server key)

Continue reading “How to setup Secure Webserver HTTPS (SSL) on Apache in Ubuntu”

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How to convert *.docx files (Microsoft Office 2007) online for free

Sometimes you might have no choice except to open Microsoft Office 2007 (*.docx) files that you’ve just received in your email. The problem is, you do not have any other application that support Office 2007 format.

Here’s an easy way to (kinda) solve that problem, you can convert Microsoft Office 2007 files online, using Google Docs.

Google Docs Logo

The steps are easy, you need to login into your Google Docs account, then upload the Office 2007 files. After that, you can choose the “Download file as” option to convert the file to your favorite document format (typically OpenDocument or older *.doc Microsoft Office word document).

Bear in mind that the conversion is not 100% perfect and there will be parts of document that won’t look exactly as the original ones.