How can shoulder surfing be prevented?

Shoulder surfing is a technique used by attackers to gain unauthorized access to sensitive information by observing someone as they enter personal data, such as PINs or passwords. To effectively prevent shoulder surfing, making keypads at an angle and covering codes can be particularly effective. By positioning keypads in a way that is not directly facing potential onlookers, the visibility of what is being entered is significantly reduced. Additionally, covering codes while they are being inputted can obscure them from prying eyes, making it more difficult for someone to capture the information. This strategy helps to create a physical barrier against unauthorized viewing, enhancing the security of sensitive data input.

The other options do not adequately address the issue of shoulder surfing. For instance, ensuring keypads are in clear view invites more opportunities for an attack, while using large screens may actually provide better visibility for observers rather than reducing the risk. Minimizing staff training would likely decrease overall security awareness rather than enhance it.