Cryptography – Key management – Having particular key generator
Patent
1996-04-15
1998-03-17
Cain, David C.
Cryptography
Key management
Having particular key generator
380 23, H04K 100
Patent
active
057296103
ABSTRACT:
In a radio paging unit, in addition to a display driver, a control system for causing a display section to display message information received via a radio reception section and saved in a message storage section includes the following sections to operate in cooperation with a control section: an encryption section for encrypting message information, a password registration section for registering a password in advance which is used to permit message contents to be disclosed to limited users, and a password collation section for collating an input password input by the user with the registered password, the control section being adapted to set a mode (normal designation mode) of performing encryption of a message on the basis of selection by the user or a mode of automatically performing encryption of all messages on the basis of automatic selection in accordance with stored encryption control information, to cancel a message encryption designation mode when the passwords coincide with each other, and to cause the display section to display a message for which the encryption mode is set after the message is encrypted by the encryption section, and to cause the display section to display a message for which the encryption mode is not set without any conversion.
REFERENCES:
patent: 5146217 (1992-09-01), Holmes et al.
patent: 5283832 (1994-02-01), Lockhart, Jr. et al.
Cain David C.
NEC Corporation
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