There is no particular security aspects provided with cloud hosting. The server availability is better with the usage of clustering systems, but for the security, it's the same than a vps on a single dedicated server.
Cloud hosting is comparatively new when compared to traditional hosting. Security is one of the most important aspects of hosting, hence in cloud hosting security is of prime concern to the subscribers. Cloud security can be enhanced when the users are careful and proactively follow the safe practices. Web hosts that offer cloud hosting must have disaster recovery system, data encryption and fully managed support.