How do mobile phones encrypt information?

The method of encrypting information content by vivo mobile phone;

Enter a message-long press the SMS session to be encrypted-encrypt-enter a privacy password to encrypt the information of the mobile phone contact. (Contacts need to be saved to the mobile phone for encryption settings)

How to set up software encryption:

1、Funtouch

Operating System (operating system)

3.0 The following systems: enter I Housekeeper-Software Management-Software Lock, set pattern password or use digital password. After setting, click "Continue" in the upper right corner to set the software password, and then set the security of the software lock (that is, security issues). Then click "Finish" in the upper right corner and click the corresponding lock icon behind the software to encrypt.

2.Funtouch OS 3.0 and above: Go to Settings-Fingerprint, Face and Password/Fingerprint and Password/Security-Privacy and Application Encryption, and set privacy password security. After setting "Password" and "Secret Security", the interface of locking software will pop up directly (some models need to click "Apply Encryption"), and you can encrypt it by turning on the corresponding switch behind the software.