Some key points are brokering:
One option to achieve this is to use a broker architecture that ensures an organisation does not hard-wire its infrastructure into a single cloud provider. This approach enables organisations to easily choose between cloud service providers and manages the subtle differences between the various providers, in terms of pricing, how an organisation connects to them and how it manages the associated keys and so on.
And tokenization:
Many IT managers have been wary of cloud computing because of the prospect of private and sensitive data being sent up to third-party cloud services. However, with the development of technologies enabling the tokenization of data, there is now an opportunity to replace any private information with a random token that can be sent to the cloud service provider, and then swapped back with the real data when retrieved. In this way, the private data is never sent to the cloud provider. Usage of tokenization will certainly help the broader adoption of cloud computing within the financial services industry.
Check out the whole article here.
Source: http://www.soatothecloud.com/2011/12/leveraging-cloud-computing-for.html
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