Risk of information leakage in the lock screen function of Android mobile phone system

I am using the Samsung i9220 android system 2.3.5
The precondition for this information leakage is that the mobile phone has enabled the screen unlocking setting function and is bound to a google account or password protection.
By default, you need to enter the unlock password or pattern after the mobile phone locks the screen to enter the mobile phone.
Below is my cell phone screen lock
 
 
 
By default, there is only one "emergency number" at the bottom of the unlock pattern of the mobile phone.
 
Assume that we do not know how to unlock the mobile phone and enter the wrong unlock pattern five times at will.
 
At this time, there is a "Forgot style" under the screen lock pattern ?" Button
 
 
Under normal circumstances, we need to enter the password of the previously bound google account to set a new unlock password.
 
 
 
However, you can press the input basket to display a function option, such as "Paste" and "Clipboard"
 
We directly select the clipboard
 
 
 
Now you can see all the clipboard records of mobile phone users, such as text messages or other sensitive information.
 
You can try other android mobile phones by yourself.
Solution:

Disable the option in the input box after the screen lock is disabled.

Author: Pig coei