In the context of security and trust, what specific challenges will virtualization and cloud computing present across the software lifecycle?

In the context of security and trust, what specific challenges will virtualization and cloud computing present across the software lifecycle?  In what ways do the experts foresee the use of each of these technologies evolving in the future?

1Cloud-Computing Cloud-Computing 2Cloud-Computing "Cloud computing" is an adaptable, practical, and demonstrated conveyance stage for givingbusiness or buyer IT administrations over...