When you convert to SaaS, your data will be transported across the Internet to the SaaS vendor site. If their application is not secure, your critical business information will potentially be exposed to anyone who can take advantage of such a vulnerability.
– Review the vendor’s service history
– Application and infrastructure security requirements
– Solid Service Level Agreements
– No silent fixing
– Data recovery
– Encryption standards and key management
– No weak links in the security access chain
– Ownership
Finally, you need to remember that software is secure only when it’s built that way, so when choosing a sound SaaS solution, be sure that the security has been checked for all vulnerabilities so that it’s secure for all of today’s distributed software portfolios.
http://www.ctoedge.com/content/security-checklist-deploying-software-service