  Network traffic monitoring using IP flows is used to handle the current
challenge of analyzing encrypted network communication. Nevertheless, the
packet aggregation into flow records naturally causes information loss;
therefore, this paper proposes a novel flow extension for traffic features
based on the time series analysis of the Single Flow Time series, i.e., a time
series created by the number of bytes in each packet and its timestamp. We
propose 69 universal features based on the statistical analysis of data points,
time domain analysis, packet distribution within the flow timespan, time series
behavior, and frequency domain analysis. We have demonstrated the usability and
universality of the proposed feature vector for various network traffic
classification tasks using 15 well-known publicly available datasets. Our
evaluation shows that the novel feature vector achieves classification
performance similar or better than related works on both binary and multiclass
classification tasks. In more than half of the evaluated tasks, the
classification performance increased by up to 5\%.
