In people's daily work and life, from the earliest going out with wallet to the quick payment of mobile phone fingerprints, from going out with keys to unlocking fingerprints now, the embarrassment of losing keys has been eliminated. Doesn't this prove that fingerprints are safer?
Zang Yali, an associate researcher at the Institute of Automation, China Academy of Sciences, told the media earlier that there are 6 billion people in the world, each with 10 fingers, and fingerprints are unique. The security of fingerprints (the probability of fingerprint identification error) should be one in 60 billion, which seems absolutely safe, but it is not. At present, the false recognition rate of commercial fingerprint algorithms (such as unlocking mobile phones) is one in fifty thousand, and the rejection rate is less than 3%.
That is to say, on the premise that someone else's finger will illegally pass the authentication once after trying 50,000 times, his finger will be rejected three times every time he tries 100. But if the false recognition rate is reduced, the rejection rate will be high. Therefore, the security of the fingerprint system is roughly one in 50,000, and the better one may reach one in 65,438+one in 10,000 or one in 200,000, but the current technology will stop here.
And an 8-digit random password, a * * will have 1 100 million schemes. In other words, if you randomly generate an 8-bit password, the probability that another person randomly guesses is 65.438+one in a billion. If you mix uppercase and lowercase letters and symbols, there will be 6 trillion possibilities.
Extended information because the password we set is not random, even if it is a random password, it is difficult for us to remember. Our password setting is usually a combination of our habits, so it is easy to crack if others know something about your password setting habits.
Zhou Zhiping, a professor at the School of Internet of Things Engineering of Jiangnan University, said: "From the perspective of the digital world, fingerprints and passwords digitize information content, and there is no obvious difference in fact." Fingerprint and password are two locks with different shapes, different structures and different principles. Which lock is "better" depends on what kind of door is locked.
Zhang Lejun told reporters that passwords may be safer for people who are particularly careful and have a good memory; For the elderly, long-term use of fixed and easy-to-remember passwords has great security risks, and it is very inconvenient to change passwords frequently and dynamically. It is more appropriate to use fingerprint technology at this time.