Some of my students have asked why we always use XOR (Exclusive OR) in encrypting plaintext into ciphertext. To answer this question, please take a look first at the output of the various combinations of inputs for XOR function. Input A Input B A XOR B 1 1 0 1 0 1 0 1 1 […]
Yesterday morning, I managed to find some time to attend the 9th INFOSECURITY CONFERENCE in Hong Kong. One of the keynote speakers was Bruce Schneier, a security guru and founder and CTO of BT Counterpane – an information Security firm offering managed security services. Bruce, the author of several best-selling books on the subject, presented […]
How can I get Linux security tools installed on my Windows Desktop instantly? Answer: Using VMware Using VMware, now you can easily try out Linux security tools. Read on… As I said in my previous post, VMware allows you to instantly install another instance of an OS on your computer system. In the case of […]
Anti Spam Filtering using Gmail? Why? I have been using Gmail, Yahoo! Mail, and Hotmail for very long time. My general feeling is that the super-powerful anti spam filtering capability of Gmail is unprecedented. It can eliminate almost 98% of spam emails while at the same time maintaining an almost zero error rate of filtering […]
Last year, a student of mine presented a very good topic on desktop security by VMware. I think it is a good idea to share with you this idea of using virtualization for desktop security. If you are not familiar with VMware, take a moment to look at their website: http://www.vmware.com Desktop and server security […]
Recently I spotted a piece of news about a type of network attack combining techniques we have discussed in recent articles involving Google Hacking and Buffer Overflow Attack . The incident, according to Forbes News1 involves “using Google searches to track down sites vulnerable to so-called ‘SQL injections’.” Essentially, the hackers use Google to hunt […]
