is one of the basic concepts of internal controls. It protects against fraud, collusion, and errors in sensitive data and financial instruments. To achieve these objectives, it involves distributing rights, privileges, duties, and responsibilities to several people so that no one person performs all of the steps in an important process.
Separation of duties (SOD)
Under SOD, one person wouldn't be allowed to both purchase equipment and cut a check to pay for it. While SOD is an important business policy, it can also be an important security policy.