The user is provided an automatic deletion option 0340
for original data files 0220. Privatizing these files and then leaving them in their
original form on the hard disk leaves them open to prying eyes, surreptitious data
mining, etc. However, the user may wish to back up original data files 0220 prior to
deletion. This yes/no toggle option 0340 gives the user control.
Level of security 0350 is a choice between two levels
of privacy protection, one the routine "private" level and the other level for cases in
which there is heightened concern over possible intent by other persons and/or the
specially high value of the original data files 0220 to be protected.
If the "high security" option is selected as the level
of security 0350, an additional drop down box appears in the dialog. Count of cascades
0360 (explained in the following two paragraphs) may range from 2 to 7 under high
security; the count of cascades 0360 is one if the merely "private" security option
0350 is selected.
Single pass fragmentation 0361 is applied automatically
if the user selects the routine level of security 0350. In this case, the original data
files 0220 selected as input by the user are subjected to the process to privatize data
0290 (detail in FIGURES 17 to 21) once only, and the outputs 0250, 0260, and 0270 on
this single pass constitute the final result. Single pass fragmentation 0361 is
equivalent to a single cascade in contrast to multiple pass cascading fragmentation
0362 in the next paragraph.
