New data compiled by Verizon in an addendum to its Data Breach Investigations Report shows that the vast majority of reported and investigated data breaches are the result of external incidents, not insider threats. Verizon s data matches up very closely with slightly normalized data contained in the DataLoss Database, a massive collection of reported data breach incidents. In order to make the data map more closely to that gathered by Verizon, the Verizon researchers removed incidents from the Data Loss Database that were. that were the. result of lost assets, improper disposal and postal mail errors
Source: https://threatpost.com/new-data-show-most-breaches-come-external-sources-120909/73233/