To get advantage in the competitive environment as well as better position in the market, more and more the criminal method of economic sabotage is in use. Here fantasy does not know any boundaries. For instance so-called “sleeper-agents” will be infiltrated in companies and they are waiting there in a demonstratively inconspicuous way for their signal to get into sabotage-action. Very often these methods are disguised as carelessness when for instance certain documents get lost, production is disturbed, and defective products leave the production-chain. Especially susceptible for acts of sabotage are data centres, here the sabotage ranges from manipulation of data, the planting of viruses to complete deletion of hard disks. Unfortunately, sabotage will be remarked only then when the damage already has occurred. Very good means for protection is the analysis of the weak points and the survey of staff.