And here we are with the second part of the Cyber Attacks Timeline for May (first part here).

The second half of the month has shown an unusual activity with several high-profile breaches motivated by Cyber-Crime or Hacktivism, but also with the disclosure of massive Cyber-Espionage operations.

The unwelcome prize for the “Breach of the Month” is for Yahoo! Japan, that suffered the possible compromising of 22 million users (but in general this was an hard month for the Far East considering that also Groupon Taiwan suffered an illegitimate attempt to access the data of its 4.1 million of customers).

On the cyber-espionage front, the leading role is for the Chinese cyber army, accused of compromising the secret plans of advanced weapons systems from the U.S. and the secret plans for the new headquarter of the Australian Security Intelligence Organization.

On the Hacktivism front, this month has been particularly troubled for the South African Police, whose web site has been hacked with the compromising of 16,000 individuals, including 15,700 whistle-bowlers.

Other noticeable events include the unauthorized access against the well known open source CMS Drupal (causing the reset of 1 million of passwords), the trail of hijacked Twitter accounts by the Syrian Electronic Army and also an unprecedented wave of attacks against targets belonging to Automotive.

If you want to have an idea of how fragile our data are inside the cyberspace, have a look at the timelines of the main Cyber Attacks in 2011, 2012 and now 2013 (regularly updated). You may also want to have a look at the Cyber Attack Statistics, and follow @paulsparrows on Twitter for the latest updates.

Also, feel free to submit remarkable incidents that in your opinion deserve to be included in the timelines (and charts).

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