thread from Dongtou County Public Security Bureau recently issued a micro-blog said-"You still dare to sell mobile phone?" ", the title of such a stunt, a lot of netizens have aroused the concern, this micro-blog said that the criminals through technical means to recover the information bought in the old phone, resulting in the original Machine 4 bank card total 120,000 missing.
After the investigation of reporters to verify that this case is not in Zhejiang, but because the sale of old mobile phones and lead to personal information leakage, this phenomenon exists. Police also issued a reminder that special attention should be paid to old mobile phones, preferably not on the phone to store too much privacy information, such as bank card account password and so on.
"Resurrection" deleted information
According to the introduction of Dongtou police, the case on the micro-blog In fact occurred in Nanjing, Jiangsu, a bank was customer complaints, the name of four bank card was copied, one day was stolen more than 10, the cumulative loss of 120,000 yuan.
The source of the reason is that the previous sale of the old mobile phone, although the original owner has restored the factory settings, but its message is still restored, the criminals get the ID card number, bank card number, telephone number, copy its calling card, login network silver and through the net Silver message verification mechanism loopholes, steal money.
The day before yesterday, the reporter contacted the backstage forwards the micro-blog civilian police, he explained, "Although Zhejiang has not received a similar case, but this situation is very dangerous, so hope to forward to remind the province of mobile phone users." ”
Is it really so easy to restore the "privacy" of your mobile phone? Recently, the reporter visited a number of Hangzhou digital communications market found that the data recovery business has actually been there.
In Hangzhou Xixi Digital Port, the Tang road communication market, "recycling mobile phone" brand can be seen everywhere. Shop assistant Xiaozheng said: "Often some people will take photos and other information mistakenly deleted, will bring over to do data recovery." ”
Why is deleted still can restore? The telephone world's technical experts explain this: the phone recovery data and computer hard disk recovery data is the same nature, even if you have to completely empty the content from the Recycle Bin, but the hard drive has been written to the data, with some software can also be restored.
And in Hangzhou some of Apple's official repair points, staff made clear that data recovery is also part of the service, but the volume of this business is limited.
In the price, the mobile phone data recovery business, there is no uniform market standards, but will be based on the ease of recovery fees, the easiest data recovery to one hundred or two hundred yuan, the difficulty may be thousands of dollars. But mobile data recovery is much more expensive than computer data recovery.
It should be explained that the smartphone data storage is divided into two areas, one is the mobile phone with built-in memory, the other is an external memory card (SD card). All data recovery is only for these two areas of data, and involves the use of mobile phone login Taobao account, micro-letter password, etc., is not recoverable.
The deleted photo is back.
have been deleted, or formatted, or to restore the factory set up the phone, in the end is how to "revive"? After communication, a digital city in Hangzhou, technical personnel fangming (a pseudonym) promised to give reporters a demonstration.
On Fangming's computer, a piece of software was installed, and he said all the data was "resurrected" on the software, and he chose a second-hand Android smartphone from the store.
Experiments began, fangming first to the experimental mobile phone to restore the factory settings, the original picture, the text was all deleted. He then connected the phone to the computer with a data line and started working on the computer with the software open.
about 15 minutes later, the computer desktop jumped out of the display and found nearly hundreds of pictures, all of which have just been removed from the Android phone. Fangming also carefully checked the numbers and found that not all the pictures were recovered, just part of it.
However, the original mobile phone text message, but still did not return to success, this fangming not feel surprised. "Simply put, the energy of the recovery software is limited, and it is difficult to recover if there are no backups, especially SMS." And in our contact customers, need to restore the short message is also very few, most of the request to restore the picture. ”
Fangming admits that the recovery software he installed on his computer was also downloaded from the Internet. "The real need for data recovery is not a lot of customers, this business is not the main industry, so can recover also depends on luck." ”
Subsequently, the reporter entered the online "mobile data Recovery", a variety of software sites jumped out of a lot of data recovery software. In the comments, many netizens reflect, can recover the data information is very limited, mostly is partial recovery.
Very low data recovery threshold
Liu engaged in this line has been more than 10 years, he told reporters, do this data recovery threshold is very low, a little bit of knowledge of computer, download some software from the Internet can be operated, the difference is only in the mobile phone manufacturers professional data recovery business, may be able to recover more things. "I've also heard that someone is specifically going to recover the information from a secondhand phone and then pack it up and sell it as a customer's message," he said. ”
"Many people think that when selling a mobile phone, just restore the factory set up, do not know in fact this is not insurance." Liu said that he had witnessed someone through the restoration of the mobile phone Notepad, got the original owner of the online account and password, "Some people will steal QQ and online games account, but the first time to steal bank accounts." ”
Low threshold, Operation secret ... In the interview, the reporter found that these seemingly very private recovery business is actually very weak security.
Reporters have tried to restore mobile phone data for the name, visited the Xixi Cyberport, BuyNow and other computer market, found that almost all stores will not verify the identity of customers, and will not require the provision of purchase vouchers, as long as the money on the line.
However, official management is still relatively strict, such as the official recovery of the Apple handset, will require customers to provide ID and password, verify the identity of the data can be restored.
How to prevent replication
So it seems that we sell the phone, a bit like the virtual hang of the big lock door, almost with anything. So what do we do?
The advice of Zhejiang Police is not to keep too private information on your phone, and not to sell your old phone.
The reality is that a lot of mobile phone recycling is not much value, but Apple and other high-end smart machines are more special, because manufacturers will occasionally launch old exchange activities. What should I do now?
Apple's official customers in the country offer a simple solution (see chart):
1, the phone will be restored to the factory set up or format.
2, then deposit some other insignificant content, the cell phone storage space is full.
3, to sell mobile phones to relatively formal manufacturers or to participate in the official old to exchange new activities.
4, even if the person with ulterior motives to recover the data, the other side is only you have previously deposited some insignificant content.
"When the system performs a file deletion, the data is not actually erased, but is marked with a ' delete ', which means the system defaults to the data being deleted, but the stored data itself persists. But because the data on the hard disk can be overwritten over and over again, data recovery can only read the information that is covered at the top, so overwrite with some irrelevant content, even if the recovery is the content. ”
Another caveat is that when using smartphones, users should try to put their privacy files in a memory card, and the rest of the files can be stored in a cell phone's built-in storage. If the phone is not used, the memory card should be taken out of custody, so as to maximize the protection of personal privacy.
