The Mori research, based on interviews with 4,028 respondents, showed that while confidence is growing among Internet shoppers, some concerns are preventing more people from spending their money online.
The survey identified the primary concerns as fear of: credit card fraud; giving out personal details; and that a company may not be genuine.
In an attempt to dispel these fears, the Department of Trade & Industry has introduced a new phase of its e-consumer programme to support its safe Internet shopping message.
This includes online advice, funding the UK end of the European Extra-judicial Network, which facilitates cross-border redress, and improving international co-operation against scams.
Consumer minister Melanie Johnson said, "Our checklist for safe Internet shopping aims to help dispel lingering fears about the safety of buying goods on the Internet."