Massive Data Theft in Citibank Hack

Mike Halsey MVP
Jun 9, 2011
Updated • Dec 30, 2012

It's being reported that hackers have stolen the details of thousands of Citibank customers including their account details and personal information.

The breach has not exposed the names, dates of birth and card security codes and all of this information remains safe.

The breach reportedly occurred in May and Citibank have been criticized for not alerting customers earlier.  Around 200,000 customers have been affected but the bank has said it could affect up to 1% of it's 21 million customers.

In a statement to the news organization Reuters, a spokesperson said "We are contacting customers whose information was impacted. Citi has implemented enhanced procedures to prevent a recurrence of this type of event."  The bank has not yet detailed how the hack occurred.

Citybank is the latest company to be hit by hackers.  The most high profile was electronics and gaming giant Sony, where the details of millions of customers were stolen.  A similar attack recently on Nintendo was unsuccessful.

Citigroup has been heavily criticized by privacy groups and advocates for its handling of the hack. Not only did the company not inform customers directly when it became aware of the successful hacking attempt, it furthermore did not offer customers free access to credit file monitoring services, something which usually is offered to customers affected by a breach to help them monitor their finances.

Since social security numbers were not stolen in the hack, it is unlikely that the hackers will be able to impersonate customers of the bank to cause further damages.

Update: Citibank recently confirmed that 360,000 customer accounts were affected by the hack, and while that is less than the 21 million suggested previously, it still means nearly double the amount the company initially assumed were affected by the security breach.


Previous Post: «
Next Post: «


  1. Mark Ybanez said on June 14, 2011 at 1:22 pm

    This is so cool!

  2. John said on June 11, 2011 at 9:30 am

    lol, “today’s hackers seem to be motivated by different factors than those of yesteryear.”

  3. Ashley Pearson said on June 9, 2011 at 10:52 pm

    Crazy. Its getting a bit more dangerous than Sony now.

  4. Tim - said on June 9, 2011 at 6:59 pm

    Wow, I heard about this this morning. We are in the infancy of cloud computing and hackers are going crazy now with the Sony debacle. They almost feel unstoppable. It’s only a matter of time before a real bank is really robbed in someway or another. Scary stuff.

    1. Rick said on June 9, 2011 at 8:05 pm

      The kicker is that we are not in the infancy of the “cloud” – the cloud is nothing more than mainframe servers being packaged and sold to the public rather than to just larger companies.

      Soon we will see cloud terminals rather than PCs if history repeats itself,. So for example, we won’t be purchasing a Dell PC – they will offer a Dell Smart Cloud Pod with software available via an annual subscription.

      The thing is that companies have been subject to many hacks in the past – the majority of which were never reported; however, today’s hackers seem to be motivated by different factors than those of yesteryear.

  5. Rick said on June 9, 2011 at 6:25 pm

    Just went looking around to see what info others had – hard pressed to find anything yet.

    NONE of the major US news networks have posted any sort of story. Now who says that the government can’t control the news agencies :()

Leave a Reply

Check the box to consent to your data being stored in line with the guidelines set out in our privacy policy

We love comments and welcome thoughtful and civilized discussion. Rudeness and personal attacks will not be tolerated. Please stay on-topic.
Please note that your comment may not appear immediately after you post it.