As the domestic pandemic intensifies, each of us is increasingly dependent on travel and health codes for our daily lives.
In order to avoid big data, some people lie about their travel trajectories and try to avoid the location of travel codes. In fact, this is caused by the lack of attention and seriousness in the prevention and control of the epidemic, and it is irresponsible to national laws and systems. We can't let our children lose this war without smoke! An epidemic is an order. I advise everyone not to think like this, because this is not only futile, but also a violation of epidemic prevention regulations and a hidden danger to society.
Many people think that the path of the itinerary code is determined by the location of the mobile phone.
As long as I turn it off, the itinerary code won't show my tracks, is that really the case?
Theoretically, the shutdown does hide the path of the travel code, but in reality it does not.
When most Android phones are turned off, everything on the phone is turned off, so of course it won't connect.
Everyone sets an alarm, and even if it's already off, it can still be turned off. If you don't want to turn on the system again, don't worry, because in the minutes before the shutdown, some programs have started. For example, QQ, WeChat and other software will automatically enter sleep mode. But you know what? This means that after the phone is turned off, there are still a few applications running. So, turning off doesn't mean that all programs are stopped!
If the phone is able to shut down and find the device, this means that the phone has a separate chip that looks for the location when the phone was lost.
Because the chip is independent, it can still work even in the case of shutdown, so the phone with this feature can still be positioned when it is down.
Apple phones, for example, have a standalone Always-onProcessor, a small, low-power chip. When we need to use it, we will open the chip to work; if we don't need to use it, we will turn off the chip. This is because this chip is a very small chip, only a few millimeters large. Even when Apple's phone is turned off, the chip is still running, and its purpose is to determine the positioning of the phone.
So, here's a reminder when Apple's phone is turned off!
If you don't shut down, just in airplane mode, won't the itinerary card be recorded?
Turn on Airplane Mode 100% Positioning. In the coming years, we will be faced with a completely new communication system: a smartphone system. The smartphone system is automatically activated and can talk to any terminal via the Internet. Smartphones can also provide various services to users. Because on the surface, the airplane mode turns off all network signals such as 2G, 3G, 4G, 5G, etc. However, it only applies to normal telephone and traffic networks.
In airplane mode, the phone can still make emergency calls such as 119 and 120. But when the phone is connected to the Internet, it cannot call any other user. This means that the phone itself is not connected to the network. If the phone can be connected to an external computer via the Internet, then the phone will not have the above problems. This proves that the phone is actually connected to the network, just denying all network connection services, except emergency calls.
Unplug the SIM card, will the itinerary code be recorded?
If you want to know this, you need to know the exact location of the phone.
All mobile phone positioning methods do not exceed three.
The most common is base station positioning. Now, with the popularity of mobile devices such as smartphones and tablets, we can use these mobile terminals anytime, anywhere for a variety of information acquisition. This means that communication between mobile phones and other electronic devices is possible. But this technology is not so simple. Your phone can connect to an outdoor network entirely through a nearby base station.
The phone can be triangulated through three base stations to determine the precise location of the phone.
The base station can be calculated by the time difference between the mobile phone and the communication, if it is only a base station, the distance between the mobile phone and the base station can only be calculated, but it is not clear where the mobile phone is.
A base station can calculate an infinite number of points at any point on a sphere with this distance as the radius. When users move within an area, they are affected by the various sites in the region, which changes their geographic location, which is called location service. Location services are a very important information gathering technology. Because we are in three dimensions, only through three base stations can we finally determine the location of the mobile phone.
Even if the phone card is unplugged, the base station can still be found, because our phone leaves the factory with only one IMEI number, which can be entered through *#06#.
As long as the phone is on, you will try to enter the base station, even if there is no SIM card, as long as the base station can recognize the phone's IMEI number, you can locate!
What happens if you hide in the basement, have no signal, block the connection between the base station and the mobile phone, and avoid the travel code?
In fact, even without base station positioning, there is satellite positioning. Mobile phone positioning is based on global positioning system (GPS) and geographic information system (GIS) technology for mobile device navigation and positioning, it is currently the most advanced, the most functional positioning method. Satellite positioning does not mean that the mobile phone can send a signal to the satellite, but it means that the mobile phone can receive time information from the satellite, and the mobile phone automatically calculates the position information by receiving the time data of the four satellite launches.
The signal power of the mobile phone is not enough to send a signal to the satellite, only a dedicated satellite phone can send a signal!
Even satellite positioning signals are blocked, and Wi-Fi locations are blocked.
Hiding in the basement, you may not have a cell phone signal, but you can only use your phone via WIFI. Moreover, every WIFI signal is sent by the router, and each router has a unique MAC address around the world. When the phone is placed in a certain location, WIFI will automatically send it an address message. If the address is fixed, then the IP address is unique. If the user wants to change the address. The address will also eventually show the location of the phone.
So, what exactly can be done to not be recognized?
The simple answer is that all electronic devices need energy to work, and without energy, it is impossible to do a lot of hard positioning.
So the only way to avoid tracking your trip code is to turn off your phone's battery. If you have GPS, you can always know where you are and be able to locate your destination. Of course, this is not an easy task. Because our location is subject to change. But now the phone and the battery are one, press the battery button, the phone is basically out of power.
Many people confuse the itinerary code with the health code!
Many people think that the itinerary code and the health code are the same technology.
Thought his health code was orange or red because he was in the same time and space as the person being diagnosed. This makes a lot of people feel incredible. But with the country's vigorous promotion of the "Internet + medical" development strategy, "what can the health code do?" "This question is no longer a question. In fact, the principle of the health code is very simple, that is, to mark the degree of risk by area.
In addition, the epidemic prevention personnel will register through the platoon, and after discovering the close contacts, they will use the background to identify the health code. If the close contact is a suspected case of COVID-19 infection (hereinafter referred to as the "suspected patient"), it can be marked on the mask. In this way, the epidemic prevention personnel can be reminded to do a good job in isolation in a timely manner. But it cannot be said to be completely safe. Therefore, the color of the health code cannot simply be marked by position.
One last point: big data only helps us to accurately prevent the epidemic, and we don't need to worry about privacy!