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Beat spam using hashcash
Built on the widely available SHA-1 algorithm, hashcash is a clever system that requires a parameterizable amount of work on the part of a requester while staying "cheap" for an evaluator to check. In other words, the sender has to do real work to put something into your inbox. You can certainly use hashcash in preventing spam, but it has other applications as well, including keeping spam off of Wikis and speeding the work of distributed parallel applications. In this article, you'll meet David's own Python-based hashc
By David Mertz, Ph.D. at IBM developerWorks.
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Spotlight
IT security jobs: What's in demand and how to meet it
Posted on 15 May 2013. | Let's say you want a career in information security, where do you start? What credentials do you need? What are employers looking for? Read on to find some answers.
Is Microsoft is reading your Skype communications?
Posted on 15 May 2013. | The question of whether Skype allows U.S. intelligence and law enforcement agencies to access the communications exchanged by its users has still not been adequately answered by Microsoft.
Internet Explorer best at blocking malware
Posted on 14 May 2013. | While Chrome’s malware download protection improved significantly, Internet Explorer 10 continues to outperform the other browsers with a block rate of 99.96%.
Researcher refuses to help Saudi telco to spy on people
Posted on 14 May 2013. | You would think that a Saudi Arabian telecom firm interested in monitoring its users' mobile communications would not be asking a well-known pro-privacy researcher for help, but you would be wrong.
Malicious browser extensions are hijacking Facebook accounts
Posted on 13 May 2013. | Facebook users - especially those in Brazil - are being targeted with malicious browser extensions trying to hijack Facebook profiles, warns Microsoft.
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