Dancho Danchev

Contributor

Dancho Danchev is an independent security consultant and cyber threats analyst, with extensive experience in open source intelligence gathering, and cybercrime incident response. He's been an active security blogger since 2007, and maintains a popular security blog sharing real-time threats intelligence data with the rest of the community on a daily basis.ggMore details on Dancho Danchev's current and past professional affiliations, can be found in his LinkedIn profile. You can also follow him on Twitter

More details on Dancho Danchev's current and past professional affiliations, can be found in his LinkedIn profile.

Latest from Dancho Danchev

Show search filters
Google intros advanced sign-in feature

Google intros advanced sign-in feature

The feature basically offers DIY two factor authentication, with users having to not only enter their passwords, but also, the code that they receive on their mobile devices, or generate for themselves.

February 10, 2011 by

Report: Google's reCAPTCHA flawed

Report: Google's reCAPTCHA flawed

New report claims 17.5 percent recognition rate of Google's reCAPTCHA, arguing that a small botnet can register 864,000 new accounts per day. Is machine-learning the real threat?

December 15, 2009 by

Google's CAPTCHA experiment and the human factor

Google's CAPTCHA experiment and the human factor

Any research is prone to irrelevance if it starts with the wrong research questions, takes the wrong perspective, or in this case, attempts to fight the wrong enemy - automated bots attempting to recognize CAPTCHAs.Researchers at Google recently released a paper detailing a new CAPTCHA system consisting of correct image rotation (Socially Adjusted CAPTCHAs) whose main purpose is to make it easier for humans, and much harder for bots to recognize them.

April 20, 2009 by

Google: Spam volume for Q1 back to pre-McColo levels

Google: Spam volume for Q1 back to pre-McColo levels

It took only a couple of months for cybercriminals to catch-up and reintroduce the massive spam volumes that briefly disappeared following the shutdown of the cybercrime ecosystem's sitting duck McColo in November, 2008.According to Google's Postini Spam data and trends for Q1 2009, during the first quarter of the year the spam volume was the strongest since 2008, increasing with an average of 1.

April 2, 2009 by

Gmail, Yahoo and Hotmail's CAPTCHA broken by spammers

Gmail, Yahoo and Hotmail's CAPTCHA broken by spammers

Breaking Gmail, Yahoo and Hotmail's CAPTCHAs, has been an urban legend for over two years now, with do-it-yourself CAPTCHA breaking services, and proprietary underground tools assisting spammers, phishers and malware authors into registering hundreds of thousands of bogus accounts for spamming and fraudulent purposes.

July 2, 2008 by

Newsletters

You have been successfully signed up. To sign up for more newsletters or to manage your account, visit the Newsletter Subscription Center.
See All
See All