IDENTITY AUTHENTICATION METHOD BASED ON N-DIMENSIONAL SPHERE

摘要

An identity authentication method based on N-dimensional sphere is provided by the present invention. An authentication server accepts a user registration and an identity verification after initialization; when a new user registers, the user computes a vector via a security one-way function according to a password selected by himself and submits it to the authentication server, the authentication server appoints an IDg as an identifier of the user identity for the user; the authentication server determines a N-dimensional sphere by combining its own secret vectors and the vector submitted by the user; the authentication server selects several different points on the N-dimensional sphere randomly, forms an encrypted file with them and sends it to the user via a security channel; when requiring for identity authentication, the user performs computation by using his own password and the encrypted file containing the identity authentication identifier, and transmits the result to the authentication server. After performing computation, the authentication server verifies and determines whether the user identity should be accepted. The present invention can reduce the storing information and the calculation amount of the authentication server efficiently, and can prevent fake authentication servers.