abstrakt: Data preprocessing is widely recognized as an important stage in anomaly detection. This paper reviews the data preprocessing techniques used by anomaly-based network intru- sion detection systems (NIDS), concentrating on which aspects of the network traffic are analyzed, and what feature construction and selection methods have been used. Motiva- tion for the paper comes from the large impact data preprocessing has on the accuracy and capability of anomaly-based NIDS. The review finds that many NIDS limit their view of network traffic to the TCP/IP packet headers. Time-based statistics can be derived from these headers to detect network scans, network worm behavior, and denial of service attacks. A number of other NIDS perform deeper inspection of request packets to detect attacks against network services and network applications. More recent approaches analyze full service responses to detect attacks targeting clients. The review covers a wide range of ...
abstrakt: Data preprocessing is widely recognized as an important stage in anomaly detection. This paper reviews the data preprocessing techniques used by anomaly-based network intru- sion detection systems (NIDS), concentrating on which aspects of the network traffic are analyzed, and what feature construction and selection methods have been used. Motiva- tion for the paper comes from the large impact data preprocessing has on the accuracy and capability of anomaly-based NIDS. The review finds that many NIDS limit their view of network traffic to the TCP/IP packet headers. Time-based statistics can be derived from these headers to detect network scans, network worm behavior, and denial of service attacks. A number of other NIDS perform deeper inspection of request packets to detect attacks against network services and network applications. More recent approaches analyze full service responses to detect attacks targeting clients. The review covers a wide range of ...
فرمت فایل : پاورپوینت قابل ویرایش تعداد اسلاید: 36 قسمتی از پاورپوینت : پردازش داده ها : پردازش داده ها سیستم های پردازش اطلاعات مورد سخت افزار و نرم افزار سیستم کامپیوتری معمولی مقدمه هدف جمع آوری داده از بیماران تهیة اطلاعات برای گروه پزشکی اغلب دادة خام جمع آوری شده را به صورت مستقیم نمی توان در فرایند تصمیم گیری وارد کرد استخراج اطلاعات معنایی (Semantic) از داده مستلزم پردازش آن: 1-مشاهده 2-تشخیص 3-درمان مشاهده: 1-جمع آوری داده و انتقالآن 2-ذخیره و بازیابی داده 3-پردازش داده و نمایش آن سیستم پردازش اطلاعات: .1حافظه .2تجهیزات: سخت افزار Hardware .3برنامه ها: نرم افزار Software کامپیوتر در تهیة داده هایی که کاربر برای تصمیم گیری به آن نیازمند است کمک می کند. «سیستم پردازش-کنترل» : سیستم کامپیوتری برای کنترل خودکار فرود هواپیما یا درمان بیمار در واحد مراقبت ویژه به کار می رود. فعالیت های فرد و سیستم کامپیوتری 1-کاربر 2-ور ...