security telephone directory

Although it is a telephone directory, appearance is a telephone directory of high security called a calculator.
This application does not communicate at all.
Since registration information is enciphered and saved in the database inside a terminal, it is a very secure design.
■ Since the calculator application is camouflaged, demonstrate power to the following.
- Prevention from capricious disclosure
- When a terminal is dropped
- A peep according to a third party in addition to this
Note:
Since it may not operate well depending on a terminal, even if data should disappear, I need your help by self-responsibility.
Since security was considered mainly and designed, from the external application, it is isolated completely.
Therefore, it cannot synchronize with the data of other telephone directories.