Is there an absolutely safe cell phone in the universe?

Today, I saw an article on zdnet accusing the iPhone 3gs of having the same data encryption function as a false one. Article . "I don't think we (developers) have seen such a bad encryption implementation," said one iPhone developer. See: http://news.zdnet.com/2100-9595_22-325008.html

However, are other mobile phones safe? Physical access is also applicable to Windows Mobile devices that use SD card encryption, at least as far as I know, there are still some technical restrictions to prevent us from using the built-in file browser to copy files (through ActiveSync ). Even from an encrypted SD card. It seems that the iPhone is more exaggerated. It can remotely erase the stuff on the ROM disk.

Similarly, almost all smart phones have security problems, including iPhone, Windows Mobile, BlackBerry, Android, and Symbian. The same applies to other mobile phones without OS. At least a specific physical method will be used to directly or indirectly obtain the data in the memory. The current processor, CPLD, and FPGA both support JTAG, you only need a set of JTAG probes, a soldering iron, a pair of tweezers and a small one.Program. All the messy data on the phone can be dragged down.

It seems that the devices that use the central encryption server are relatively safe. But once the data on the device is taken naked, it's all nonsense, because the data on the device contains encryption and decryption programs or components. You don't need any extra effort to crack the device. This principle is the same as that of a hack PC and then automatically logging on to the other party's QQ.

However, this does not mean that we are completely powerless on security. To achieve relative security, we can only use physical isolation or destruction of data, which is the same as the principle for some integrated circuits to prevent board copying. Once external intrusions are detected in the Flash area, Flash is destroyed by some physical means.

Therefore, it can be basically said that there is no absolutely secure mobile phone in the Universe at present. Maybe in the future, while emphasizing the office, entertainment and multimedia functions of mobile phones, data security will become more and more important, especially for security departments, military officers and business people.