Abnormal keyboard input detection method and device, and safety prompt method and device

Abstract

The application discloses a keyboard input abnormality detection method. The method comprises: obtaining an operation of a user for a keyboard in a mobile terminal; generating Z values corresponding to a plurality of dimensions according to the operation; generating a chi-square value corresponding to the operation according to the Z values corresponding to the dimensions; if the chi-square value is greater than a preset threshold, determining that the operation is an abnormal operation; and if the chi-square value is less than or equal to the preset threshold, determining that the operation is a normal operation. According to the keyboard input abnormality detection method provided by an embodiment of the application, based on normal distribution and chi square distribution principles, a keyboard input behavior is compared with historical data to determine whether a current input behavior is input by an account owner or not, so that whether a current account information input operation is an operation of the account owner or not can be identified more accurately, the identification rate is increased, and the misjudgment rate is reduced. The application furthermore discloses a keyboard input abnormality detection apparatus as well as a security prompt method and a security prompt apparatus.

Description

technical field [0001] The present application relates to the field of computer technology, and in particular to a method and device for abnormal keyboard input detection, and a safety prompt method and device. Background technique [0002] With the rapid development of e-commerce, online consumers are no longer limited to their own countries, and more foreign users are also purchasing goods from China through e-commerce platforms. [0003] In traditional foreign card payment transactions, the cardholder only needs to enter the bank card number, credit card security code CVV2 and card expiration time, and the system considers that the cardholder himself is making the payment, and rarely uses other mechanisms to verify the identity of the user again Undergo verification. However, while this mechanism brings us convenience, it also causes another security problem. When the bank card information is stolen, the thief can easily transfer the funds in the card through network tra...

AI Technical Summary

Problems solved by technology

However, while this mechanism brings us convenience, it also causes another security problem. When the bank card information is stolen, the thief can easily transfer the funds in the card through network transactions only with the obtained card information. transfer stolen goods

[0004] However, under the existing foreign card transaction verification mechanism, how to accurately identify the real identity of the operator and identify the thief has become an urgent problem to be solved

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