IACS issued a guidance report on Remote Update/Access aiming to establish recommendations for control over remote access to onboard Information Technology (IT) and Operation Technology (OT) systems. Additionally, where remote maintenance is used, clear procedures and protective measures, which include mechanisms for validating updates prior to their deployment and simply reverting to earlier revisions in the case of corruption, should be adopted.
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https://safety4sea.com/iacs-recommendations-for-remote-access-to-onboard-it-systems/