The difficulty in assessing the quality of vendors in terms of security makes security risk one of the most critical risks in purchasing products/services online. This study found that a symbol of security was an important risk-reduction strategy in online air-ticket purchases. Fenech and O’Cass (2001) suggest that online marketers should adopt the use of customer protection to help consumers overcome their security concerns in online transactions. In this perspective, using the symbol of security approval is an effective way to ensure the security of their websites. For example, the third-party seals of approval such as VeriSign and TRUSTe can be effective in reducing consumers’ perceived risk in online shopping