Abstract
This article proposes geo-authentication as part of a multi-level security solution to supplement and strengthen existing defenses (e.g., technical and behavioral approaches) against social engineering attacks. The technology behind this tool is explained and several potential applications are discussed related to online banking and voting. Data are collected regarding changes in perceptions of security when using specific applications common among young adults (Facebook and online banking). Findings show geo-authentication is perceived as a useful tool, which has a significant impact on perceptions of security in computer transactions and may affect the decision to use such products.