Between November 27th and December 15th, 2013, retail giant Target fell victim to a sophisticated hack that compromised data on tens of millions of its shoppers. Information on approximately 40 million credit and debit card accounts was stolen during the breach, and this sensitive financial data quickly appeared on the black market. Target would later reveal that names, mailing addresses, and phone numbers for up to 70 million customers had also been taken during the attack. The retailer is cooperating with the US Secret Service and Department of Justice to find those responsible; those perpetrators currently remain at large. Target's holiday breach ranks as one of the largest retail hacks in history. In response to the ordeal, the company offered affected customers one year of complimentary credit monitoring and identity protection.