FIELD: data processing.
SUBSTANCE: group of inventions relates to means of providing authenticated messages. To this end, a method, a transmitter and a receiver are proposed to authenticate and protect integrity of message content. Method includes a step for determining duplicate message content in messages. Method includes a step for calculating partial authentication codes for messages based on the message repeating content, wherein the first authentication code for at least one portion of the messages can be calculated from at least one portion of the partial authentication codes for authenticating the repeating content of the message. Method includes a step for providing messages, wherein the messages include repeating content of the message and, accordingly, at least one of the partial authentication codes.
EFFECT: technical result is providing integrity and authenticity of repeating message content.
17 cl, 8 dwg
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