Matrix print data storage and method for encoding the data

The aim of the invention described in the text is to realize the high-density storage of the enciphered data with optical grating printing on the object, especially on the paper. The printing graph blocks on the object are independent to one another and are formed by dividing the optical gating cell composed of optical grating points with a predefined mode, and each optical grating cell includes more than two different models R and I. Each R and I model is composed of many pairs of models (R0 and R1) or (I0 and I1) which has same size and do not overlap, each model is adjacent to at least one optical grating point to space the optical grating cell adjacent to another model, and these models occupy the different optical grating points of the optical grating cell.