FIELD: information technologies.
SUBSTANCE: method includes the following stages: a) when a bar code is entered into a reading system, at least one authentication element is generated substantially automatically, which relates to an internal physical characteristics of a base and independent on data contained in a bar code; and b) bar code (20) reading is permitted only in case the result of base authentication is positive, or bar code reading is permitted independently on the result of the base authentication, and in case of negative result of the base authentication, access is prohibited only to one part of data contained in the bar code and/or to any data possibly associated with a bar code and stored on a data carrier separate from the base. Also an appropriate system of bar code reading is proposed.
EFFECT: higher protection of bar code against attempts of its reproduction.
33 cl, 14 dwg, 8 ex
