In recent years, with the widespread application of QR codes, this humble black and white "mosaic" is quietly changing our way of life. As long as consumers "scan" this small square with their mobile phone camera, they can read more data information and application services. The use of QR codes also makes the traceability of commodity circulation more convenient. For the anti-counterfeiting of goods and food safety, Are of great significance. So, what exactly is a "two-dimensional code"? What are the advantages compared to bar codes? What are the security risks in use? How to prevent it?
QR codes carry more information and are being widely used
A small "mosaic" rectangle, as long as you "scan" it with a mobile phone camera, it can display a lot of information contained in it ... Maybe you still have a question. Previously, barcodes have had many applications in life, such as Products on supermarket shelves have bar codes. What are the advantages of QR codes compared to bar codes?
According to experts, the bar code is one-dimensional, and the two-dimensional code is coded vertically and horizontally, and the amount of stored information is much larger. Compared with one-dimensional bar code, RFID (radio frequency) and other technologies, two-dimensional codes can carry a large amount of information in a small area, printing and reading costs are lower, confidentiality is stronger, and recognition efficiency is also higher; in addition, two The space utilization rate of the dimensional code is high. In addition to the common OR code, other code systems can also be used for encoding. In addition, the error correction capability, correction capability and encryption function mentioned above are the advantages of the two-dimensional code.
In fact, the two-dimensional code is based on the one-dimensional bar code to expand another dimension, using a rectangular pattern to represent binary data, the two-dimensional bar code is recorded in the length and width range, can accommodate up to 1850 capital letters or 2710 Digits or 1108 bytes or more than 500 Chinese characters, which are dozens of times higher than what ordinary barcodes can store; not only that, but also can encode information such as pictures, sounds, text, fingerprints, URLs, etc .; compared to RFID radio frequency Technology, the two-dimensional code does not require a chip, is easy to encode, can be presented on multiple carriers by printing, and the reading device is relatively simple, therefore, the efficiency is high and the cost is low.
Many users have an experience when scanning a QR code-they do not need to be clearly aligned, and sometimes even scan a part of the QR code to read the information. For example, when the supermarket cashier scans the barcode of the product, the barcode on the plane such as the box is easily scanned, but for uneven items such as buns and vegetables, the barcode sometimes cannot be scanned out, and it has to be manually entered, and the QR code has Strong fault tolerance, when the QR code is damaged or bent, it can still be read, and even the damaged area can reach 50%.
In recent years, the application of two-dimensional codes in life has covered all aspects. The application of two-dimensional codes has also made the circulation of articles more convenient, which is of great significance to the anti-counterfeiting of goods and food safety. As a simple example, the production date and shelf life of food will be scanned by the manufacturer into the QR code when the product leaves the factory, avoiding manual tampering with the production date.
When the mobile phone camera and the QR code recognition software are combined, each mobile phone user has a portable code reader that can recognize the QR code at any time to obtain various data information and application services. With the popularity of 3G, QR codes provide users with convenient access to browse the Internet, download applications or online payment functions. Therefore, as a more advanced and efficient coding method, the two-dimensional code is gradually replacing the existing one-dimensional bar code.
Two-dimensional code may hide traps
In recent years, with the rise and widespread application of QR codes, since there is no threshold for its production and release, illegal activities such as spreading malicious URLs and releasing mobile phone viruses through QR codes have gradually increased. Recently, CCTV has exposed the QR code "suck fee" scam, and its safe use has caused widespread concern.
According to experts, although QR codes do not carry viruses themselves, many virus software can be downloaded using QR codes. Since the QR code technology has developed very maturely and the "threshold" is relatively low, the criminals can use the QR code generator to make QR codes according to their own wishes and hide the traps in them. Investigations from relevant network security monitoring agencies show that the current QR code technology is becoming a new channel for the spread of mobile phone viruses and phishing websites, and is being used by criminals. After the user scans it, it directly links to a phishing website, or a Trojan horse program, such as a website disguised as a bank credit card, or congratulates the user on winning, and requires input of personal information such as account number and password, so that the user can unconsciously recruit Problems such as phone bill deductions and consumption of Internet traffic ensue.
Tianjin citizen Ms. Liu scanned a QR code advertisement for group food in the elevator, but what she did not expect was that her mobile phone froze after only a few seconds. When she restarted, she received the operator A short message indicating that the balance of the call charge is insufficient. She inquired about the phone bill and realized that she was deducted 100 yuan for no reason. Afterwards, someone told her that she downloaded the mobile phone virus.
Industry insiders pointed out that the QR code is like a sugar coating. It is only a carrier and does not carry viruses. However, wearing this gorgeous and mysterious clothes on a poisonous website, it is easy to deceive users by disguising. The reason why the QR code will maliciously attract fees and scams is mainly due to the following reasons: first, the generation method is simple, the content is unaudited; second, the hidden Trojan horse and other viruses, some criminals will generate toxic or plug-in URLs A QR code, declared as a coupon or video, to induce users to scan. This kind of scam specifically targeted at mobile Internet users mostly adopts methods such as forced downloading and installation of application software to achieve the purpose of obtaining promotion fees or malicious deductions; third, the user has insufficient awareness of prevention, and some people are out of curiosity. Immediately after picking up the QR code, I picked up my phone and scanned it, but ignored the security issue.
In addition, the QR code may also cause the leakage of personal information. For example, the information on the early train tickets is not encrypted, and after discarding, others can easily obtain the personal information on the ticket; and the current train ticket QR code can only be read by the railway department with specific identification software. The key information is preset in the dimension code. Even so, from a professional perspective, with the development of information technology, there is still a risk that these encrypted information will be cracked.
Do n’t scan the code, beware of the risks behind it! Industry insiders remind consumers that they should install QR code detection tools for mobile phones and develop good usage habits. For QR codes provided by irregular websites and on-street distribution slips The QR code should be wary, don't scan it if you see it. At present, some websites have a QR code payment channel online. Scanning the QR code can realize shopping and payment. It is very convenient. However, when using the mobile payment function, consumers should see the website domain name clearly. Window page; If you use a mobile phone to bind with a bank card, do not store too much funds in this card to avoid a chain reaction. Pay attention to choose the platform to publish the QR code. In general, QR codes on regular publications such as newspapers and magazines and QR codes on packaging of well-known brands are relatively safe, and QR codes of unknown sources posted on websites and Weibo should not be scanned easily.
In addition, after scanning the QR code, if you encounter a QR code link that will automatically download and install the software when you open it, you need to be more vigilant. When it prompts to download, do not easily click to confirm, download and install. If the software is installed by QR code, after installation, scan it with anti-virus software and then open it to ensure safety.
Simple production and lack of standards, urgently need to strengthen norms and self-discipline
Recently, the author experienced a two-dimensional code production, input "QR code generator" in the search engine, and found that there are at least more than 10 software that can be used to create "QR code", many of which have been used More than a million times. The author opens a software at will, and enters a URL that he finds into it. Within a few seconds, a small black and white box is generated. After clicking "Download and save QR code", he scans it again with his mobile phone. Browse the page quickly. The entire process takes only 3 steps and takes less than a minute.
It is understood that due to the relatively simple QR code generation method, production and release, the content is unaudited, not all anti-virus software can recognize the QR code virus at present, and there is no clear supervision method specifically for QR code in our country, which is easy to appear Various violations and violations. Because the entire QR code image has no content introduction, users must "scan the code" to obtain the key information of the product. This hidden nature may bring false advertisements and the release of illegal content, which is more difficult to fix, plus Difficulties in investigating and obtaining evidence have brought certain difficulties to supervision. In addition, since the two-dimensional code has not yet implemented a completely universal encoding method, it also faces a standardization problem. Therefore, people in the industry call for, in addition to the daily attention of users, the industry management department should also follow up in time, formulate relevant laws, regulations and technical standards to restrict the production and release of QR codes, and increase the entry threshold; Strengthen interaction, increase penalties and supervision to regulate related behaviors, and strengthen industry self-discipline.
It is reported that last year, the Special Working Group on QR Codes of the China Electronic Chamber of Commerce Specialized Committee on the Application of Internet of Things Technologies Products was established. In addition, some QR code reader software manufacturers have begun to maintain user security through embedded antivirus software and firewalls. I believe that with the formulation and implementation of relevant laws, regulations and technical standards, and the continuous regulation and self-discipline of the industry, the application of QR codes will make consumers convenient, safe and secure.
Square aluminum Patio Dining Set are welcome four place settings and with hand rattan weaving rattan, to make your life different and special. You can choose different size and color to decorate your dining and garden.
The quality is last year in, year outside for at least two years.
Durable powder-coated aluminum to resist corrosion year after year
Accommodates up to nine place settings very comfortably
Pair with handwoven wicker Beaumont Dining Collection, which includes armchairs, corner, right-facing and left-facing loveseat.
· RUST-FREE ALUMINUM FRAME
· ALL-WEATHER HANDWOVEN WICKER
· HIGH UV RESISTANT WICKER
· EASY TO CLEANAND CARE
· 100% WATERPROOF FABRIC
· 2 YEAR WARRANTY
About us:
1.our factory is more than 20000 square meter big.
2. Our showroom is about 800 square meters.
3. we have professional sale team and more than 200 workers.
4. The capacity of our factory is 60 containers/month.
5. we attended CIFF furniture fair and canton fair.
Welcome your inquiry for further discussion.
Square Patio Dining Set,Wicker Square Dining Set,Outdoor Square Dining Set,Garden Square Dining Set
Golden Eagle Outdoor Furniture Co., LTD. , https://www.geoutdoor.com