Password system utilizing two password types, the first being changeable after entry, the second being unchangeable until power is removed
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United States of America Patent
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May 19, 1992
Issued Date -
N/A
app pub date -
Mar 29, 1988
filing date -
May 22, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An information protective device protects stored information such as a program, data or the like in an information processing apparatus such as small type of portable computer or the like. The information protective device comprises a prohibition condition storing portion, which stores the writing prohibition condition to a storage unit for programs, data or the like, and a prohibition condition setting means, which carries out the writing of prohibition instructions to be stored in the storing portion to set the writing prohibition condition, so that the storage unit may be handled like so-called read only memory (ROM), whereby the storing contents may be protected more positively.
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