That approach does have the advantage of speed, but it's not really a substitute for physically overwriting all the data. History is rife with examples of peop

That approach does have the advantage of speed, but it's not really a substitute for physically overwriting all the data. History is rife with examples of people getting themselves into serious hot water by assuming that the lack of a well-known weakness in a cipher means that the cipher is secure. Anyone who's got an extremely high need for data security is hopefully keenly aware of that.