METHOD TO AUTHENTICATE USERS BASED ON GRAPHIC PASSWORD THAT VARIES IN TIME Russian patent published in 2012 - IPC G06F12/14 H04L9/32 

FIELD: information technologies.

SUBSTANCE: method to authenticate users with protection against spying, consisting in preliminary generation of a set from N small graphic symbols, giving the choice to the user from the generated set to memorise the group of S secret small graphic symbols s_k, by displaying on the screen those N graphic symbols selected from the set optionally, generation of an invisible secret area A_i, limited with a polygon with tops in centres of secret symbols displayed on the screen K_i, fixation of a point d_i of user's impact at the screen, generation of the positive result of completion of i stage of authenticating information input, besides, additionally the user is given to memorise a selection p_k of a secret template of symbols from the base P_k of secret templates for a k secret graphic symbol s_k, the next selected template is displayed on the graphical symbol s_j, the positive result of completion of the i stage of authenticating information input is formed.

EFFECT: making it possible to authenticate on any screens produced according to different technologies of image display.

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