ANTI-PEEP USER AUTHENTICATION METHOD Russian patent published in 2015 - IPC G06F21/31 G06F12/14 

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to user authentication. An anti-peep user authentication method comprises preliminary formation of a set of N graphic symbols, where N is a natural number, the value of which is limited by the possible number of graphic symbols which can be placed on a screen with a quality which enables recognition of said graphic symbols, providing the user with a selection from said set for storing a group of S secret graphic symbols s_k, where k=1…K, where K is the number of graphic symbols in the group S, selected based on the ease of memorisation by the user, carrying out the i-th step of inputting authentication information, wherein i=1…I, where I is the total number of steps, by displaying on the screen N_i graphic symbols randomly selected from the set, among which an s_i-th secret symbol is placed in an arbitrary position, the secret symbol being selected from the group S of secret symbols, forming an invisible secret area A_i, fixing a point h_i of user action on the screen, generating a positive result of carrying out the i-th step of inputting authentication information upon satisfying the condition of association of the fixed point of action of the invisible secret area h_i∈A_i and a negative result otherwise, generating a positive decision on authentication after obtaining positive results of carrying out all I steps of the user inputting authentication information a negative decision otherwise, wherein the graphic symbols from the set N are arranged on the screen in the form a table, in which symbols have random coordinates (Xs_i,Ys_i), where Xsi=1…a and Ys_i=1…b (a is the number of rows in the table, b is the number of columns in the table), further providing the user with a gesture from a database of secret gestures for memorisation, each gesture being formed by a pair of numbers (d₁,d₂), where d₁ and d₂ are natural numbers, wherein d₁ and d₂ are less than or equal to the greater value between a and b (d₁,d₂≤max{a,b}), when carrying out the i-th authentication step, forming the invisible secret area in the form of a set of graphic symbols of the table having coordinates (X_Si±md₁, Y_Si±md₂), where m is natural number, wherein md₁ and md₂ are less than or equal to the greater value between a and b (md₁,md₂≤max{a,b}), and fixing the points of user action on the screen by selecting any symbol from the invisible secret area.

EFFECT: high efficiency of user authentication.

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