Researcher buys old computers, flash drives, phones and hard drives and finds only two properly wiped devices out of 85 examined examined. Josh Frantz collected 214,019 images, 3,406 documents and 148,903 email messages. His haul included 611 email addresses, 50 dates of birth, 41 Social Security numbers, 19 credit-card numbers, six driver s license numbers and two passport numbers. Only two devices were wiped properly, and three were encrypted, he said.
Source: https://threatpost.com/second_hand_insecure_data/142948/