Explanation
It is imperative that an application perform checks when each function or portion of the application is accessed, to ensure that the user is properly authorized to access it. Without continual checks each time a function is accessed, an attacker could forge requests to access portions of the application where authorization has not been granted.

Legal controls are those controls that are designed to comply with laws and regulations whether they be local or international.

One approach that many cloud providers opt to take is to undergo a SOC 2 audit and make the report available to cloud customers and potential cloud customers as a way of providing security confidence without having to open their systems or sensitive information to the masses.

Tokenization is the practice of utilizing a random and opaque "token" value in data to replace what otherwise would be a sensitive or protected data object. The token value is usually generated by the application with a means to map it back to the actual real value, and then the token value is placed in the data set with the same formatting and requirements of the actual real value so that the application can continue to function without different modifications or code changes.

Public clouds, such as AWS and Azure, are massive systems run by major corporations, and they account for a significant share of Internet traffic and services. They are always expanding, offer enormous resources to customers, and are the least likely to run into resource constraints compared to the other deployment models. Private clouds would likely have the resources available for specific uses and could not be assumed to have a large pool of resources available for expansion. A community cloud would have the same issues as a private cloud, being targeted to similar organizations. A hybrid cloud, because it spans multiple clouds, would not fit the bill either, without the use of individual cloud models.