Final answer:
The two basic methods to conceal internal frauds are removing its causes and controlling its effects. Proactive measures and reactive measures through intelligence and counterintelligence services are the primary strategies.
Step-by-step explanation:
The two basic methods of concealing internal frauds are by removing its causes, and by controlling its effects. In other words, fraud can be mitigated either by eliminating the factors that lead to it or by managing its impact when it does occur. Removing the causes of fraud involves proactive measures such as establishing strong internal controls, promoting an ethical company culture, and implementing rigorous hiring and vetting processes to deter potential fraudsters.
Controlling the effects of fraud, on the other hand, refers to reactive measures such as the application of intelligence services to detect and defeat threats, and the use of counterintelligence services to protect the nation or an organization from internal fraud threats.