FIELD: information technologies.
SUBSTANCE: device to receive messages, every of which has a sequence number, comprises facilities to memorise multiple statuses of preliminary reception (SR(n)), facilities to transform (E308) a status (Sr(n)), related to a sequence number (n) of message (M) receipt, having the specified sequence number (n), and facilities (E310) to process a message depending on the status (SR(n)), related to its sequence number (n), at the same time statuses of preliminary receipt are memorised in the form of a bit table, and the table consists of multiple sublists.
EFFECT: prevention of an attack of a repeated message transfer type.
13 cl, 8 dwg
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