The
COVID-19 pandemic and the rapid development of technologies have forced
restructuring education at all levels. This change from traditional to digital
learning demanded that teachers and students possess higher digital literacy.
Moreover, it required them to be aware of the importance of security and its
countermeasures to protect e-learning systems. The aim of this paper was
twofold. First, it focused on security issues when using Moodle, Zoom.
Blackboard, and edX. Furthermore, it offers best practices to address
security threats and cyber-attacks from the outside network to e-learning
systems. From this study, a cryptography mechanism arises as the best technique
to protect the confidentiality, integrity, and authentication (CIA) of data on
the e-platforms. However, it is not strong enough to mitigate cybersecurity
attacks in e-learning systems. For that reason, it is suggested that the
cryptography mechanism needs to be combined with other techniques such as
biometric authentication, firewalls, IDS, digital watermarking, and security
process models.