After you read the reading below, please talks about IaaS, PaaS and SaaS! Can you share the provider name? 
To what do you attributed the increased security today vs. historically? 


please read 
Practically, cloud computing is used for delivering the hosted services over the internet. Through this service, shared resources, information, software are provided to the computer and other devices as utilities like electricity grid over the network. It is true that cloud computing is now more secured and effective as compare to its services in past. Now we have various cloud computing service provider in our areas which can offer the good services with various benefits. I have chosen one cloud computing service provider who is very known in the area. the services provided by him can be divided in three categories - Infrastructure-as-a-Service (IaaS), Platform-as-a-Serivce(PaaS), and Software-as-a-Service(SaaS). The advantages of these services are - Firstly, it is sold on demand that can be for the minutes or an hour. Secondly, it is very elastic in terms of a user can have as much or little service as per his demand at a given time. Thirdly, this service is fully managed by the service provider. It means that as a consumer, we do not need to do anything except in arranging a personal computer and internet access. It is very much secured and there is no issue of violating the privacy. The main reason of getting the services from this service provider is to get easy, flexible services as per requirement.