Verizon - 2013 Data Breach Investigations Report
Executive summary and detailed reports are available as follows:
QUOTE: This year's DBIR combines the expertise of 19 organizations from around the globe. Discover stats that might surprise you—from the percentage of espionage-related attacks to the astonishing length of time it often takes to spot a security breach.
* 47,000+ Security Incidents Analyzed.
* 621 Confirmed Data Breaches Studied.
* 19 International Contributors.
* 6th Consecutive Year.