Abstract:

The rapid development of Internet applications facilitates people’s work and life，as well as provides a broad space for invaders.Constantly changing and evolving methods of attack，which make the traditional enterprise security system facing unprecedented challenges.As cloud computing’s success in landing areas，cloud-based security services has moved from concept stage to the improvement and extension phase.Cloud security services can solve many security threats and challenges， including the telecom operators in many fields within a wide range of applications.

Key words: cloud computing, cloud-based security service, SLA