Computer-implemented security methods and systems

Abstract

The present disclosure relates to securing networks against attacks launched via connection of peripheral devices to networked devices. According to one aspect, there is provided a computer-implemented method of automatically updating a network security policy, the method comprising: running a machine learning algorithm to continuously update a plurality of weighting coefficients associated with a respective plurality of threat factors, the threat factors each having values defined for each of a plurality of requests for respective peripheral devices to connect to one or more networked devices which are communicably coupled to a secure network; and automatically updating a security policy associated with the secure network in respect of a particular threat factor when that threat factor's associated weighting coefficient changes by more than a predetermined amount in a predetermined period, wherein requests for peripheral devices to connect to the networked devices are automatically approved or denied in dependence on that policy.