MIT researchers determined that 90 percent of shopper's credit-card transactions could be used to:
A) Uniquely identify an individual's shopping habits and preferences.
B) Collect individual social security numbers.
C) Identify an individual shopper using only four bits of secondary information.
D) Both A and C, but not B.

Question

Quizplus · Accepted Answer

MIT researchers found that by analyzing anonymous credit-card transactions, they could accurately identify an individual using only four pieces of secondary information. Additionally, they determined that 90 percent of a shopper's credit-card transactions could be used to uniquely identify their shopping habits and preferences. However, credit-card transactions do not provide access to an individual's social security number.

MIT Researchers Determined That 90 Percent of Shopper's Credit-Card Transactions