The link provided is to an article on Fuzz testing. This type of testing involves injecting bad data to challenge your applications and safeguards. This type of testing can be important to verify risk control measures and data integrity checks are verified. The name Fuzz testing is a fairly recent moniker for techniques that have been required in safety critical industries for a long time. One might also consider bug seeding (defective code) to challenge a medical device’s overall safety architecture.