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Method for Normal/Maximum Level on Hard Disk Password

IP.com Disclosure Number: IPCOM000112731D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Itoh, M: AUTHOR [+4]

Abstract

Disclosed is a hard disk drive which supports two different security levels for a Hard Disk Password (HDP): Normal and Maximum. With the Normal level, the security lock for the HDD can be unlocked by a master password even if the user forgets the password. With the Maximum level, the security lock cannot be unlocked by any means other than formatting. Disclosed is a method to realize these two levels of hard disk password in a hard disk which does not support security levels but has four password areas.

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Method for Normal/Maximum Level on Hard Disk Password

      Disclosed is a hard disk drive which supports two different
security levels for a Hard Disk Password (HDP): Normal and Maximum.
With the Normal level, the security lock for the HDD can be unlocked
by a master password even if the user forgets the password.  With the
Maximum level, the security lock cannot be unlocked by any means
other than formatting.  Disclosed is a method to realize these two
levels of hard disk password in a hard disk which does not support
security levels but has four password areas.

      The subject hard disk supports up to four passwords and has
"Match Count (MC) to unlock the password security.  The match count
is a number of the password required to unlock.  Fig. 1 shows an
example.  In this state, the correct three passwords are required to
unlock the hard disk.  Passwords and match count are set by a utility
program to set the hard disk password.

The disclosed technique is to define Normal and Maximum levels as
follows:

1.  Normal Level
    As shown in Fig. 2, four password areas are used: two User
    Passwords (UP) and two Master Passwords (MP).  Each password (UP
    and MP) is the same character string.  Match Count (MC) is set to
    2.  To unlock the password security, either UP or MP can be used.

2.  Maximum Level
    As shown in Fig. 3, all four password areas are used as a User
    Password (UP), and Match Count (MC) is set to 4.  The pass...