FIELD: light industry, in particular, processes of protection of a seal and/or stamp against unauthorized use, as well as methods for protection of a seal and/or stamp against unauthorized use. SUBSTANCE: the method for protection consists in replacement of characters of the information field of the seal and/or stamp in time and in space. The system of replacement of characters in time and/or in space is preset, the characters and/or the space between the characters are coded by changing the structure of the material of the seal and/or stamp, and the information on coding is registered for identification of the seal and/or stamp. Replacement of the characters in time and/or in space on the information field is accomplished in accordance with the mentioned system. EFFECT: enhanced secrecy. 3 dwg
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