The attorney general told the Senate Judiciary Committee that his agency is investigating who's behind the data breach that compromised as many as 110 million cards and personal records.
The fakes actually transfers files, but it also peddles malware.
The agreement with Facebook, Google, Microsoft and others lets them give more information on the government's data requests
The company has not confirmed a compromise but is notifying customers as a precaution.
The retailer's CIO says that the company exceeded security recommendations for handling card data.
This was no million dollar bug.
Did security companies publish too much, too soon on the Target breach?
The 23-year-old contends the program he helped develop has a defensive purpose as well
Underground forum postings indicate both may have used the same online nickname, according to IntelCrawler
IntelCrawler also identified a 17-year-old Russian who it says wrote the BlackPOS malware, a version of which was used against Target
Payment card numbers may have been compromised, but the retailer says Social Security numbers, birth dates and customer PINs appear to be safe.
The data was quietly moved around on Target's network before it was sent to a US server, then to Russia.
Bitly is working with Symantec to clean up malicious links, the result of API keys left visible on the Web
The company hopes to tap the security research community to find potential problems
The new versions of Chrome for Mobile will be available in the next few days