An anti-cracking verification code generation method

Abstract

The invention discloses an anti-cracking verification code generation method, which randomly rearranges the characters of the question stems of the verification code to generate a picture sequence P; and performs an XOR operation with a random number R and a serial number ID to obtain an encrypted question number EID; send the candidate answer group A, question number EID, and picture sequence P to the requesting end; then perform an XOR operation with the random number R and the question number EID returned by the requesting end to obtain the real question number ID, Find the exact answer a corresponding to the question number ID, compare the found exact answer a with the selected answer a1 returned by the requester, and obtain the verification result. The present invention greatly increases the difficulty of automatic identification of the computer, greatly increases the difficulty of cracking the verification code, effectively achieves the purpose of preventing cracking of the verification code, and increases the security of the web system.

Description

technical field [0001] The invention relates to the technical field of network security, in particular to an anti-cracking verification code generation method. Background technique [0002] In the process of identity verification of web services, in order to avoid CC attacks, malicious cracking of passwords, swiping tickets, flooding forums, etc., verification codes are generally used; verification codes identify normal human beings by providing some questions that are difficult for computers to understand Behavior to filter out illegal and abnormal behaviors. [0003] In the prior art, the verification problem is usually placed in the picture, which increases the difficulty of automatic computer recognition. However, at present, the ability and accuracy of computer image recognition are already very high, and it can directly solve the problems hidden in the picture, greatly reducing the defensive effect of the verification code. At the same time, computer image recognitio...

AI Technical Summary

Problems solved by technology

However, at present, the ability and accuracy of computer image recognition are already very high, which can directly solve the problems hidden in the picture, greatly reducing the defense effect of the verification code

At the same time, the computer image recognition technology is very mature and popular, which reduces the difficulty of cracking the picture verification code; makes the verification code lose its original meaning

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