An Encrypted Traffic Identification Scheme Based on the Multilevel Structure and Variational Automatic Encoder

Table 1

The traffic feature set.

No.	Abbreviation	Description in English
1	Total_fpackets	Total number of packets in the forward direction
2	Total _fvolume	Total number of bytes in the forward direction
3	Total_bpackets	Total number of packets in the backward direction
4	Total_bvolume	Total number of bytes in the backward direction
5	Mini_fpktl	Minimum forward packet length
6	Mean_fpktl	Mean forward packet length
7	Max_fpktl	Maximum forward packet length
8	Std_fpktl	Standard forward packet length
9	Mini_bpktl	Minimum backward packet length
10	Mean_bpktl	Mean backward packet length
11	Max_bpktl	Maximum backward packet lengt
12	Std_bpktl	Standard backward packet length
13	7th_fpktl	The first 7 packet sizes in the forward direction
14	7th_bpktl	The first 7 packet sizes in the backward direction
15	Min_fiat	Minimum forward interarrival time
16	Max_fiat	Maximum forward interarrival time
17	Mean_fiat	Mean forward interarrival time
18	Std_fiat	Standard forward interarrival time
19	Min_biat	Minimum backward interarrival time
20	Max_biat	Maximum backward interarrival time
21	Mean_biat	Mean backward interarrival time
22	Std_biat	Standard backward interarrival time
23	Flow_type	Type of flow