Data modification / manipulation attackA data modification attack is a difficult to recognize active attack, it is based on interception and manipulation of exchanged data. This data can be modified so that the receiver gets another message than the sender sent. These types of attacks very often come from inside the organization.
Attackers manipulating and shifting data around is a real threat that could cause large financial (f.e. stock-market) and physical harm too (f.e. when an attacker can manipulate health records and change other people's medications or diagnoses).