Suddenly received the verification code, carefully "sniff" the stolen bank card.
"Sniffing" is a device composed of laptop, mobile phone and RF antenna of sniffer. After the device is started, it can "absorb" the mobile phone when the 2G network within the range of Fiona Fang 1.5km is not moving, and obtain the short messages received by the mobile phone and the phone number of the mobile phone in real time.
Take advantage of loopholes in some websites and apps to obtain information such as name, ID number, bank card number, etc., and combine the dynamic verification code monitored in real time to steal on third-party and fourth-party payment platforms.
When you receive a strange verification code and a short message, you should immediately contact the mobile phone application and website service provider to which the short message belongs, and quickly check your bank card and payment application. If you find money stolen, freeze the bank card as soon as possible, keep the content of the SMS and call the police, and consider turning it off temporarily.
CAPTCHA is the abbreviation of "automatic public Turing test to distinguish between computer and human", and it is a public * * * automatic program used to distinguish whether the user is a computer or a human.
It can prevent malicious password cracking, ticket brushing and forum flooding, and effectively prevent a hacker from constantly trying to log in to a specific registered user and using a specific program to violently crack. In fact, using verification code is a popular way for many websites now, and we have realized this function in a relatively simple way.
This question can be generated and judged by computers, but only humans can answer it. Because the computer can't answer CAPTCHA's question, the user who answers the question can be considered as human.
For people with mental and physical disabilities who can't see images, the alternative method is to read words and numbers by voice. In order to prevent speech from being recognized and analyzed, the content of speech will be noisy. ?