Since entering the era of mobile Internet, people have felt the necessity and urgency of information security in Internet security incidents again and again. Open source Android phones are full of loopholes, and we must have known that even the closed IOS system often bursts security holes. Now, in the mobile Internet era, all our secrets are open with the opening of the mobile Internet. Now we need a piece of software or hardware to ensure people's information security. Of course, security is not absolute, but relatively safe.

Now let's take a look at this product, which protects everyone's privacy and security -- Andersen Shield

Next unpacking process

On the front is the simple and generous logo and Lei Feng's trial red label

On the back is the QR code and relevant technical parameters of the secure message download. We can only operate at night because we are too busy during the day. Sorry for taking too many photos!

The following is the true face of Mount Lushan. Xiao Dun has begun to show his face

For the family portrait, there is a small and exquisite data cable of Ansmiton in the package, instructions, and this trial product is a memory free version.

The Xiaodun I got is dark blue official website and there are other colors for you to choose from. In this personalized era, there are few personalized color configurations of products, and I am embarrassed to mix them. The overall shape of Xiaodun is like a Chinese style jade. In the middle is a multi-functional button, surrounded by a colorful indicator light, which flashes in different colors under different circumstances. It is very beautiful, There is a buzzer outlet and a mini USB port on the edge. Here are some large high-definition pictures for you to enjoy.

Now let's talk about how to use it Actually An accessory hardware of the security letter, just like the ICBC U-Shield is an accessory of the ICBC service, so you must use the security letter if you want to experience it.

Another very considerate function is to retrieve the Secret Shield. Generally, the Secret Shield is placed with the car key, etc. The phone can click the button to start retrieving the Secret Shield, and then the Secret Shield will emit a beeping sound, but the sound is very low. You can only hear it if you listen carefully.

First, literacy knowledge: As its name implies, "Secure Message" is a social application that helps users protect their privacy and confidentiality. It supports instant messaging and network calls. The highlight is that all data is encrypted with high strength by Secure Shield, so as to effectively resist malicious attacks from external hackers and third-party organizations.

Security message function

Encrypted chat and secure communication;

Top secret conversation, no trace chat;

Destroy information remotely at any time;

Screenshot notification: In safe mode, anyone who saves a chat record will be notified of screen capture.

The usage is also similar to the various shields in the bank. When logging in the secret letter, you must have a secret shield (press the button in the middle of the secret shield). And the secret message is also transmitted through an ultra complex encryption protocol, which can not be said to be 100% safe, but also allows you to easily avoid the threat of most network security events.

The following is professional literacy

Since I am an embedded R&D engineer, I will now lead you to understand this product from the perspective of embedded.

Due to time urgency and other reasons, I haven't had time to disassemble the security shield. The following assessment is purely personal experience and can not fully represent the real situation. Please know!

For example, let's retrieve the phone function. When Xiaodun connects the phone and presses the Retrieve Phone Function button with the phone, the phone will send a code to Xiaodun via Bluetooth (provided that Xiaodun is still within the Bluetooth communication range of the phone), and then the information sent will be stored in the Bluetooth receiving buffer area of the processor, Then the processor will interrupt to remind the host that an instruction has been sent. By comparing with the agreed instruction library, it can be known that the host cannot find the small shield. Then the small shield processor will start to drive the LED light to flash through the IO port and let the buzzer send an audible alarm. This is just a simple explanation. The details will be very complicated.

MyShield is a kind of embedded product, which consists of processor system, power supply system, interactive system, RF circuit, etc. It can be seen that MyShield is highly integrated.

MyShield is connected to the main device through a new generation of low-power Bluetooth 4.0. The water from the low-power Bluetooth protocol has brought the latest intelligent hardware industry. As we all know, Bluetooth is a very convenient communication method, and has become the standard configuration of mobile phones for several years. But in the past, due to the high power consumption of Bluetooth, it was only limited to transmitting some small files at any time, Unable to perform the data exchange task of continuous connection, all kinds of intelligent hardware now exchange information with the host through low-power Bluetooth version 4.0 or above, and the chip manufacturer has also produced relevant special chips such as Nordic's N RF5182 2 Bluetooth soc chips, such as Baidu and Xiaomi's smart wearable products, all use this Products or series of products, N RF5182 2 is an ultra-low power 32-bit ARM Cortex-M0 core processor integrated with Bluetooth wireless protocol

Above is the circuit board of an intelligent wearable device, and the largest one in the middle is the processor. Some sensors beside it, such as motion sensors and geomagnetic sensors, should not be equipped with these sensors. In addition, MyShield can add some other new functions and applications through the Bluetooth upgrade system. By original BootLoader automatically starts the application. Of course, you can also find the compiler port of the chip to download and debug the compiled code through Jlink, ARM Cortex-M0 supports a variety of compilers and interfaces, and jlink is the most commonly used and the cheapest and best purchased one on the market. Then you can enjoy DIY,

Summary:

On the whole, the cooperation of Secure Message+Secure Shield can really protect our information security, but sometimes it seems a little cumbersome. After all, I feel that as a poor loser, it is unnecessary to achieve a high degree of encryption for ordinary chat records, but some business people should especially need this product to protect information security.