448th: What is JAILBREAK?

　"JAILBREAK" is an English word that means jailbreak.It is a game console that uses a computer or computer, which is not the intended method by the manufacturer or administrator, but is used as a word that refers to other installation methods and the situation that can be started.It is an act outside the support, and is basically an underground term.

　In mobile phones, JAILBEAK is performed on Apple's "iPhone", which is known for being able to use apps that have not been screened.Other than mobile phones, JAILBREAK is sometimes called JAILBREAK to install software, which is not released by the manufacturer, mainly overseas, mainly overseas.

■ Install an unjudgment app on the iPhone

　For devices such as "iPhone" and "iPod touch" where the word "jailbreak" is most commonly used, the application must be obtained from the App Store.

　To register your application in the App Store, you must be reviewed by Apple.However, there may not be a problem of parental control, or a problem such as copyright, or the reason may not be cleared, and the screening may not be cleared.Apps that have been able to clear the screening, or unretable apps cannot be installed on the iPhone.However, JAILBREAK has been created to enable such apps to be registered on iPhone and iPod touch.

　Technically, there are several ways to jailbreak, but many are used a lot to execute when the power is turned on, and a part of the OS.The modified software is sometimes called CFW (Custom Firmware, remodeled firmware).With these techniques, you can access the original protected OS file system so that you can register an app in a non -regular way.

■ Out of support, there is also a security danger

　"If you do jailbreak, you can use it with any app" seems to be useful.But I can't really say so.

　First of all, if JAILBEAK measures are taken by the OS version upgrade by the manufacturer, it may be that the unknown application will not work.As a result, even if the device does not move or breaks down, it will not be eligible for support.

　Also, "you can use any app" means that you do not know if the app you want to use is safe.In other words, the act called Jailbreak becomes a security hole and sometimes the iPhone is dangerous.

　As a specific example, computer viruses for jailbeak iPhone exist.

　Overseas, you will be infected with the jailbreak iPhone, change the wallpaper, explore the device around for iPhone or iPod touch, and repeat the spread of the infection if there are JAILBEAK devices ...Is confirmed.

　In this example, there was no other damage just by repeating the spread of infection, but in the app using JAILBEAK, this virus combined with the security hole of "authority promotion", various various in the iPhone.You can also read or send data without permission.Mobile phones include not only the user's own information, but also the information of the people around you, such as friends, family, work and schools, so it is possible to leak such information.And a hacking tool that actually steals data in the iPhone has been reported.

　Discussions are not progressing in Japan to see if the act called Jailbreak is illegal.In the United States, Apple claims that it is illegal, and NGOs argue.