Data is protected in secure data centers with an array of physical and network safeguards including 24X7 CCTV monitoring and Bio-metric access requirements. Resources are shared to achieve a lower TCO without sharing data. SAP Business One provides single-sign on access with functional and data level security. with the increasing sophistication of hackers and the high level of maintenance required to keep a system from outside intrusions you are more at risk with an on-premise deployment