The vast majority of Greeks avoid shopping over the Internet, mostly because they do not trust online payment systems and fear that their personal details will be revealed, a study has shown. Last year only 4.5 percent of Greeks made any online purchase, according to a study by the polling firm VPRC whose results were made public by the General Secretariat for Consumer Affairs yesterday. Of those questioned, 85 percent said they did not plan to make an online purchase over the next six months, with 36.7 percent citing doubts about the security of online payment systems and 31 percent expressing fears about a possible leak of personal data. However, those who do shop online described it as user-friendly, convenient and often cheaper than regular shopping. The average Greek who shops online spends 754 euros a year on goods and services, including airline tickets, hotel reservations, car rentals and the purchase of books and computer equipment. Four in 10 Greeks use the Internet, but mostly for e-mail and research purposes.