Material (2) electronic virus
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John : From 2004 to 2010, Kelvin hack me by this way for 30 times. That mean every 3 months , Kelvin use this method to hack me 1 time.
Me: So, you reinstall the Windows for 30 times and lose all the information of your computer for 30 times.
John : Yes,.
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John : Nor gate is used for comparing.
Me: 0 is false. 1 is true.
John : or 0 is mask-interrupt. 1 is process clock line.
Me: Ok. It is same as if statement.
John : Yes,.
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If (Nor gate)
{
Start_up (0 or 1); // Hacker change the field of Object into Stop_all (0 or 1);
return 0; <--- No error.
}
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Subject [Nor gate]
Object [Start_up] <---- Hacker change the field of object into Stop_all
Interrupt_status [ 0 or 1]
0 is mask-interrupt.
1 is process clock line.
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Subject [Start_up]
Object []
Interrupt_status [0 or 1]
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//Subject [Stop_all]
//Object []
//Interrupt_status [0 or 1]
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John : If the register of start_up work, it must be on process clock line.
Me: True. If the register of Start_up is always at mask interrupt, this register never work.
John : In this case, no error.


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