A Multimode Network Steganography for Covert Wireless Communication Based on BitTorrent

Table 1

The main notations and symbols.

Notation	Description
Single-Link Steg	Single-link steganography mode
Multi-Link Steg	Multi-link steganography mode
Mode	Steganography mode
S_len	The length of secret information
Secret_info	The content of secret information
Padding	The remainder of Bitfield field
File	The shared video file
sizeof	Function of calculating the shared file size
Index	The index of secret data block
S_block (i)	The i-th secret data block