Survey: Credit or debit cards more secure than smartphones for in-store or online purchases. Personal computer was seen as safest option for accessing the Web by 62 percent of respondents. Nearly seven in 10 didn’t feel that storing payment information on a smartphone was safe. Fingerprint and retinal scanning were the favorites with 53 percent and 46 percent of the respondents rating them a four or five. Forrester Research: Percentage of Americans doing any e-commerce on mobile phones as 10 percent “tops””]