| 摘要 |
A portable telephone comprises a nonvolatile memory, an operation unit, a liquid crystal panel and a microcomputer. The microcomputer is operable to: creat a conversion table upon an input from an owner; receive an encrypted electronic mail; check whether or not a password accepted by the operation unit coincides with the password stored in the nonvolatile memory; decrypt the received encrypted electronic mail with reference to the conversion table to generate a decrypted electronic mail, if the password accepted by the operation unit coincides with the password stored in the nonvolatile memory; store temporarily the decrypted electronic mail; control the display of the decrypted electronic mail temporarily stored in the microcomputer on the liquid crystal panel; and delete the decrypted electronic mail temporarily stored in the microcomputer according to an order for stopping displaying the decrypted electronic mail on the liquid crystal display. |
