Specifications

104
4.7 Encrypt External Storage
Overview
This function enables to enhance the security by encrypting the external storage (SD card,
microSD card, USB storage, OTG USB storage).
1. Feature
- Encrypt the external storage by encryption key.
- Allow to use the external storage, encrypted by same encryption key, among terminals.
- Not allow to read/write encrypted external storage in PC/other manufacture terminals.
- Possible to backup and restore the contents in external storage by backup/restore tool.
- Enable to develop the application without considering about the encryption.
2. Usage
[Step1] Configure the encryption key
※ This encryption key will be used in common for all external storage
[Step2] Configure to enable/disable encryption function for each external storage.
[Step3] Format the external storage
- Case to encrypt : Format the external storage by encryption key.
External storage will be encrypted media.
- Case not to encrypt : Format the external storage to FAT file system.
External storage will be unencrypted media.
※ If the external storage is formatted, all data in the storage will be
deleted.
3. Configuration and Activity
Table 4.10
Y : Possible to mount and read/write
N : Impossible to mount and read/write (displayed as blank storage at notification bar)
Terminal
Media
Terminal PC / Other
manufacture
terminals ..
Not to
encrypt
To encrypt
Encryption
key A
Encryption
key B
Unencrypted media Y N N Y
Encrypted
media
Encryption key A N Y N N
Encryption key B N N Y N