科技通报
科技通報
과기통보
BULLETIN OF SCIENCE AND TECHNOLOGY
2013年
7期
170-172,193
,共4页
网络流量异常%流量检测%瞬时频率%网络安全
網絡流量異常%流量檢測%瞬時頻率%網絡安全
망락류량이상%류량검측%순시빈솔%망락안전
network traffic anomaly%Traffic detection%instantaneous frequency%network security
针对目前网络攻击的频率越来越高，网络防御的压力剧增，导致现有的算法无法满足网络管理员对网络维护需求的问题。基于传统的瞬时频率算法，将其微分方法改进为相位差分法，并且根据实际需求的不同，提出向前有限差分、向后有限差分、中心有限差分等三种相位方差法以实现对传统瞬时频率算法的优化，然后根据提出的瞬时频率快速算法建立流量异常检测模型。实验表明，这种算法极大地提升了网络流量异常检测的精度和速度，检测能力得到大幅提高，并且实现了网络攻击的快速检测功能。
針對目前網絡攻擊的頻率越來越高，網絡防禦的壓力劇增，導緻現有的算法無法滿足網絡管理員對網絡維護需求的問題。基于傳統的瞬時頻率算法，將其微分方法改進為相位差分法，併且根據實際需求的不同，提齣嚮前有限差分、嚮後有限差分、中心有限差分等三種相位方差法以實現對傳統瞬時頻率算法的優化，然後根據提齣的瞬時頻率快速算法建立流量異常檢測模型。實驗錶明，這種算法極大地提升瞭網絡流量異常檢測的精度和速度，檢測能力得到大幅提高，併且實現瞭網絡攻擊的快速檢測功能。
침대목전망락공격적빈솔월래월고，망락방어적압력극증，도치현유적산법무법만족망락관리원대망락유호수구적문제。기우전통적순시빈솔산법，장기미분방법개진위상위차분법，병차근거실제수구적불동，제출향전유한차분、향후유한차분、중심유한차분등삼충상위방차법이실현대전통순시빈솔산법적우화，연후근거제출적순시빈솔쾌속산법건립류량이상검측모형。실험표명，저충산법겁대지제승료망락류량이상검측적정도화속도，검측능력득도대폭제고，병차실현료망락공격적쾌속검측공능。
Network defense against network attacks are more frequent, pressure surge, existing algorithms cannot meet the network administrator needs of network maintenance. Based on the the traditional instantaneous frequency algorithm, the differential method to improve the phase difference method, and according to the actual needs of different forward finite difference, three phase variance of the backward finite difference centered finite difference method to achieve the traditional instantaneous frequency optimization of the algorithm, and then establish traffic anomaly detection model based on the instantaneous frequency of the proposed fast algorithm. The experiments show that this algorithm greatly enhance the accuracy and speed of the network traffic anomaly detection, detection capability substantially increase, and achieve the rapid detection of network attacks.
