ANOMALY DETECTION DEVICE, ANOMALY DETECTION METHOD, AND ANOMALY DETECTION PROGRAM
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United States of America
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Issued Date -
Jan 30, 2025
app pub date -
Dec 15, 2021
filing date -
Dec 15, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
An abnormality detection device includes processing circuitry configured to input a normal packet to a Bidirectional Encoder Representations from Transformers (BERT) model learned using the normal packet, and acquire a size of Attention for each byte portion when encoding of the normal packet is performed, sample an important byte portion of the normal packet based on the size of the Attention of each byte portion of the normal packet acquired, and rewrite the sampled important byte portion to a random byte to generate a pseudo-abnormal packet, and determine a threshold value of an abnormality degree for detecting an abnormal packet based on the abnormality degree of the generated pseudo-abnormal packet group and normal packet group.
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