Email fraud could be the biggest online security fraud this Black Friday - here's how to stay safe

Cropped close-up of five people sitting on a bench with shopping bags - only shows their legs.

Cybersecurity firm Proofpoint has warned that American shoppers are at high risk of being victims of email fraud as Black Friday reaches its height, and has laid the blame with the retailers.

In fact, its study found that more than half of the top 50 online retails across the US are not taking appropriate measures to protect their consumers from email fraud and cybercrime.