Quickly upgrade the system, there are still more than 100 million iPhone can be violently cracked.

Remember that tool called IP Box? It costs $200 and takes a few days to crack an iPhone--if it's running iOS before 8.1.1.

Recently, the FBI and Apple have had a lot of trouble in cracking the criminal mobile phone. One of the main reasons is that the iPhone 5c has been upgraded to iOS 9, and it is impossible to let the third-party tool break it. However, according to the latest system installation rate, there are still millions of iOS devices at risk.

I don't know if you remember the iPhone exhaustive cracking tool called "IP Box," which can disable the number protection mechanism by cutting off the power supply, and then guess the user password repeatedly from 0000 to 9999, even if Touch ID is set, although it may take days, but the success rate is very high.

Apple fixed such a large vulnerability as early as iOS 8.1.1, which means that IP Box is powerless against iOS 8.1.1 and newer versions of iOS devices. But according to official Apple data, 23% of iOS activated devices are running iOS 8 or older, both those who do not want to upgrade and those who cannot continue to upgrade.

According to data released by analysts, the number of activated iPhones is about 450 million to 475 million, which means that at least 104 million iPhones are conservatively estimated to still have vulnerabilities that can be brute-force cracked by tools like IP Box.