Method for achieving three-dimensional verification code

Abstract

The invention discloses a method for achieving a three-dimensional verification code. The method comprises the steps that a three-dimensional sphere capable of rotating is drawn and each point on the spherical surface of the three-dimensional sphere is expressed through a vector; a set of noise points are randomly added to the spherical surface of the three-dimensional sphere according to a preset rule; generated characters in the verification code are projected onto the three-dimensional sphere; two points are randomly chosen from the spherical surface of the three-dimensional sphere and are connected to form a line, so that a random noise line is generated; the random noise line is displayed on a verification interface to be identified by a user. A method for drawing the three-dimensional sphere capable of rotating comprises the steps that an icosahedron is drawn and coordinates of the icosahedron are stored in an array; in terms of each triangular face, midpoints of the three sides are obtained, and the length of the vector of each midpoint is adjusted to be identical to the radius of the sphere; each triangle is divided into four parts, the icosahedron is subdivided into an eighty-face body and a three-hundred-twenty-face body according to the recursive algorithm, and by parity of reasoning, the icosahedron is divided until a body similar to the sphere is obtained.

Description

technical field [0001] The invention belongs to the technical field of information security, in particular to a method for realizing a three-dimensional verification code. Background technique [0002] Before the verification code appeared, spam comments could easily go through the registration process of any website and attack forums in various ways; similarly, hackers could also crack account passwords through brute force searches, causing huge losses to users. [0003] If a user keeps posting a series of the same meaningless content in the forum, soon the entire forum section will be full of this spam, and other information will be pushed to the back of the queue. Imagine that there is a program that automatically publishes information, which can send a message every five seconds, so the number of messages sent in a day is at least tens of thousands. When there is too much spam to delete, the forum collapses. This is the so-called malicious irrigation. In the same way,...

AI Technical Summary

Problems solved by technology

However, finding a verification code with a very low success rate of machine recognition is still a key point of network information security at present, because a good verification code can better protect the user's personal information and the sustainability of the forum. what scholars pursue

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