Security situation awareness method and system based on request frequency

The invention discloses a security situation awareness method and system based on request frequency. The system comprises a request frequency receiving method, a security frequency big database, a request frequency judging method and a security situation comprehensive evaluation system. The receiving method of the request frequency uses a frequency response criterion of data packet cycle collection, the big database of the safe frequency is based on an HDFS distributed file system, the judgment method of the request frequency is based on an optimized K-Means algorithm, the received request frequency is compared with the big database of the safe frequency, and the abnormal request frequency is identified; the comprehensive evaluation system of the security situation is established on a Linux system based on a Hadoop architecture, and the judgment method of the request frequency is fused to realize interception, report and storage of the abnormal request frequency. The security situation awareness method and th