NEW YORK ( -- According to the UnisysSecurity Index Report, an increasing number of Americans are "very" concerned about the security of their financial information.

Only 28% of Americans said they were "very" concerned last year, but 35% reported the same level of worry now.

More than half (59%) of the people surveyed in March said they were very or extremely concerned about other people getting their credit or debit card details. Only 17% said they were not concerned at all, down from 18% last year and 19% in 2012. It seems that recent credit card breaches at TargetMichaelsNeiman Marcus and Sally Beauty have caused questions for some Americans.

Also see: Target's 46% Drop in Profits Means America Is Finally About to Meet Chip-and-PIN Credit Cards>>

Nearly four out of 10 people express heavy concern for online shopping and online banking. Only 34% of people were not concerned at all.

Many people expressed concerns about computer security, and 36% said they were worried about their computers in reference to spam emails and viruses.

A significant finding is the fact that 59% of those surveyed said they would be less likely to do business with a company after a security data breach. If stores continue to suffer data breaches as they have been over the past few months, this could be quite a blow to the retail community.

Bill Hardekopf is chief executive of

, which compares and rates more than 1,000 credit cards. He is the co-author of "The Credit Card Guidebook."