Spam Filter

Today, the “Fuji Sankei Business i” newspaper in Japan, published an article about my research of Information Security at The University of Tokyo. The topic of the article is “Time Based Spam Filter” (in Japanese).

These proposed spam filter works using the time information of the email to classify it as spam or not-spam. The actual accuracy of the filter is around 90%. One of the pros of this filter is that is full-independent of the language of the email and is one of the most efficient spam filters. These give us a great tool for implementing in mobile devices or as a auxiliary method to fight spam.

This research was submitted to the WISA2007 (10th International Workshop on Information Security Applications) ICICS2007 (The 9th International Conference on
Information and Communications Security) conference that will be held in Korea China at the end of August December. The proceedings of the conference will be published in the Springer LNCS (Lecture Notes on Computer Science).

Here you can download a copy of the article published by the newspaper:

The full article of the research will be available for download after the conference at the Springer homepage.

Posted by Vadim Zendejas 27.Jun.07 Technology, Security, Research Read more Comments (3)

‘86 Mac Plus vs. AMD DualCore

Hal Licino just published a study at hubpages.com about a comparison between efficiency on basic operations in two computers. That is not new, but the interesting thing is that one of that computers is 21 year older than the other!

The two candidates where a ‘86 Mac Plus running System 6.0.8 OS and a AMD DualCore running Windows XP SP2.

And who you think that is the winner?? Unbelievable but the Mac Plus was faster than the AMD DualCore in 53% of the operations tested!!

The tests consist of simple, but most used operations that current office users use in normal environments in Word and Excel. And the article claims that “the massive advances in technology in the past two decades have brought zero advance in productivity“.

Here is the link to the article if you want to see the details of the test:

“86 Mac Plus Vs. 07 AMD DualCore. You Won’t Believe Who Wins”

This is the machine that won to the AMD DualCore:

Posted by Vadim Zendejas 02.Jun.07 Technology Read more Comment (1)

Comments on a Map Wordpress Plugin

Have you ever wanted to show in a google map from which country your visitors that have been posted a comments come from?

Ok, so I just developed this new plugin so everyone can see this information. This new plugin is based on the ip2nation database.

This plugin checks for all your visitors comments in your posts and obtain the IP address for each comment. Then based on the IP address, the plugin obtains the country and the longitude and latitude of that country. With that information and thanks to the wonderful GoogleMap API; the plugin can generate a map with markers indicating the places from where the comments have been wrote and the number of comments in that country.

Here you can see the map of my comments generated by this plugin:

Posted by Vadim Zendejas 06.Apr.07 Technology, Programming, Plugins Read more Comments (11)

IP 2 Nation Location Wordpress Plugin

I modified the wordpress plugin called IP 2 Nation in order to retrieve 2 important values of the ip2nation database used in the generation of maps: the Longitude and Latitude of the country based on the IP. This plugin is based on the version 1.1 by Ozh and Per Gustafsson.

This is my first plugin update for Wordpress, I hope it is useful. I am planning to use it to generate another plugin for create a Google Map based on the IP addresses of the comments of a user.

Any suggestion, is welcomed, thank you.

Posted by Vadim Zendejas 05.Apr.07 Technology, Programming, Plugins Read more Comments (22)