The destroy method suits all hard copy and most ISM other than virtual storage: it makes recovery of the target data infeasible even in a laboratory and leaves the ISM unable to store data. It can be the sole remaining choice once an ISM has failed or its interface is obsolete. Recognised physical techniques are disintegration into unrecognisable particles or constituent elements, incineration to ash, melting, pulverizing to powder and shredding into small particles. Bending, cutting or emergency measures such as drilling or shooting only partly damage the ISM and leave portions recoverable. As data density and material hardness rise, some techniques lose effectiveness, so shredding and pulverizing of ISM are reserved for data in the lowest security categories only.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.