Seek a practical "information" encryption software for smart phones.

I recommend SMS master, I always use it, I can set my own password, I can set my password every time I read SMS, or I only need it once, I can also set my own SMS library, and I can set a person's SMS inbox or ringtone ... There are many functions, and the landlord can explore it by himself after installation. Copy the short message library after USB link to the mobile phone. Very convenient. I always use it.