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.
A radio paging unit comprising: input means adapted to be operated by a user to input pieces of various setting information; radio reception means for receiving control information and message information transmitted from a radio base station; message storage means for saving received message information from said radio reception means; encryption means for converting the received message information into encrypted message information; display means for visually displaying the received message information and the encrypted message information; password registration means for registering a password in advance which is used to disclose message contents to limited users; password collation means for collating an input password from said input means with the password registered in said password registration means, and control means, wherein said control means is adapted to store encryption control information for designating whether an encryption mode for message contents is designated on the basis of selection by the user or automatic selection, to allow the user to determine through said input means and said display means whether to perform encryption for each of the pieces of received message information when the encryption control information designates selection by the user, to automatically set the encryption mode of performing encryption of all the pieces of received message information when the encryption control information designates automatic selection, to cancel the encryption mode set for the received message information upon reception of a collation result indicating password coincidence from said password collation means, to cause said display means to display the received message information for which the encryption mode is set after the information is converted into encrypted message information by said encryption means, and to cause said display means to display the received message information, without any conversion, for which the encryption mode is not set.
Claim 2
Dependent Claim
68 words
A unit according to claim 1, wherein said control means is adapted to cancel only for a predetermined period of time the encryption mode for message information, of the received message information, for which the encryption mode is set, upon reception of a collation result indicating password coincidence from said password collation means, and to set the encryption mode after the lapse of the predetermined period of time.