The average company loses $92.3 million a year to mobile fraud, according to a new survey of 250 companies. Retailers were the single biggest group of companies surveyed, followed by computer software firms, banking and financial services. The fraud typically came in such forms as purchases made with stolen credit cards, theft of money from online banking accounts, and fake prescriptions ordered through health websites. The vast-majority — 77 percent — relied on user names and passwords, and 52 percent also looked at device IDs.”]