Posing for a picture and flashing the V sign may expose your fingerprints, giving criminals an opportunity to steal your important information.

Researchers with the National Institute of Informatics in Japan successfully got fingerprint information from a picture during an experiment, even though the subject was photographed from three meters away, according to the newspaper.

“Once you share them on social media then they’re gone. Unlike a password you can’t change your fingers.”

Biometric（生物统计的） security is reaching the mainstream with more than 50 percent of mobile phones set to include fingerprint recognition for the first time in 2017. The technology is also used in immigration control and for access to high-security controlled areas.

Photos that include both people's faces and fingers run a higher risk of revealing personal information, and the risk for celebrities is even higher.

Chinese experts in fingerprint identification confirmed the possibility. "Technically, we can use high-definition video cameras to obtain people's fingerprints," said Dr. Yin Desen of the First Institute of the Ministry of Public Security. He also said that people's external features are easily recorded. However, compared to video, it is more difficult to obtain fingerprints through just one photo.

According to experts, criminals are able to use counterfeit fingerprints to commit crimes, such as stealing fingerprint passwords and signing agreements. Yin warned that people should pay more attention when they leave fingerprints or use them as passwords.

How to protect children Web fans from unsuitable material on-line while encouraging them to use the Internet has long been discussed in the U.S.

For some parents, the Internet can seem like a jungle, filled with danger for their children. But jungles contain wonders as well as dangers and with good guides, some education, and a few precautions(预防措施), the wilds of the Internet can be safely navigated(航行). “Kids have to be on-line. If we tell our kids they can’t have access to the Internet, we’re cutting them off from their future,” said an expert.

Most kids have started to use search engines. Many of them are great for finding tons of interesting Internet sites, and they can also locate places where you might not want your kids to go. There are search engines designed just for kids. A certain software contains only sites that have been selected as safe. The most popular way to limit access would be to use what is known as a “content screener(过滤器)”. But this can’t be wholly reliable(可靠), and the best thing parents can do is to talk to their kids and let them know what is OK or not OK to see or do on the Internet. Another way is that mum or dad is nearby when the child is surfing(浏览)the Internet.

A few other tips

What will you do if you can’t eat everything bought in the canteen? 【小题1】According to a survey, what students waste every year could feed over 10 million people.

【小题2】 According to Xinhua News Agency, the food wasted by Chinese people is about 50 million tons of grain every year, which could feed 200 million people.

Food waste, which has become a global issue, serves as a mirror that reflects various cultural and social issues in different countries. In the West, for instance, consumerism, the belief that it’s a good thing to use a lot of goods and services, is often to blame for food waste. 【小题3】Chinese people are well known for being hospitable and generous. Many even feel that they lose face if their guests have eaten all the food. On campus, a generation of single children is less aware of the food waste issue. Students nowadays are well protected by their families and hardly have any concept of how much toil (辛劳) others go through in order to provide them with the food they eat.

【小题4】 There are over 925 million hungry people in the world, most of whom live in underdeveloped countries and areas. They don’t have enough food to eat. Many children die for lack of nutrition each year in some African countries. And farmers work very hard to grow the crops.【小题5】It’s also important that everyone should think about how they can do their bit to reduce food waste.