Write a review of the four major cloud service providers, identifying the key

 
Write a review of the four major cloud service providers, identifying the key services of each. After the completion of the review, discuss the security strategy of any one of them; please provide detailed explanation regarding their approach to security.
Your paper must conform to the APA style format and must be your own original work. A professional looking paper, well written with complete references is expected. 1500 words minimum.