Story - Public Cloud

Public cloud is cloud services which are accessible by any person or organisation. Dropbox, OneDrive and Google Docs are examples. These services are used not just by individuals, but by organisations. Complex and confidential projects might be conducted using OneDrive. Company data may be maintained using the public services of a cloud provider such as Amazon.

What are the risks with this? IT may be all very well storing family photographs on a public cloud, but it may be very different when it comes to running a major organisation.

Tasks
Question: Find 4-5 public cloud providers (e.g. Dropbox, OneDrive, Google, Amazon) and review what they offer, compare and discuss.
Identify the main problems that need to be addressed in selecting and uses public cloud services. How should an organisation use public cloud? As well as security and privacy, what are the other issues that should be addressed? What should be the guidelines for using public cloud? Will public cloud usage encourage shadow IT in organisations?