2. Click the "Settings" icon.

3. Click "Device" and then select "Lock Screen".

4. Click "Screen Lock".

5. Click "Signature".

6. After entering the signature registration page, enter the signature that you want to unlock (take "Note 3" as an example here), and then click "Continue".

7. Enter the same signature a second time, and then click Continue.

8. Enter the same signature for the third time, and then click "Confirm".

9. Enter the backup PIN, and then click Continue.

10. Enter the backup PIN code again, and then click OK to complete the setting of signature unlocking.

1 1. When the screen is locked, you can unlock it by drawing the set signature with SPen's handwriting and enter the main screen page.

According to the provisions of the Electronic Signature Law, an electronic signature refers to data contained in a data message in electronic form and accompanied by data used to identify the identity of the signer and show that the signer approves its content.

There are many common technical means to realize electronic signature, including biometric data (such as iris and fingerprint), digital image of handwritten signature or seal, digital signature based on public key cryptography, etc. Due to different application technologies, there are also differences in security.