A multinational company has five regional offices around the globe, between which large amounts of confidential data are exchanged every day over the internal network. It also maintains a separate web presence in each region, selling goods online to the local market. Design a key management system to support the company’s activities, discussing all relevant aspects of the key management lifecycle?

I have relevant information on the key lifecycle and what all to include however I am not sure where to begin this and how to frame my answer accordingly? Any ideas will help thanks.