Steghide 是 Linux 下一款命令行隐写工具,预装在 Kali Linux 中,
对于 Ubuntu,使用下面的命令安装。
sudo apt update && sudo apt install steghide
z@ubuntu:~$ steghide --help
steghide version 0.5.1
the first argument must be one of the following:
embed, --embed embed data
extract, --extract extract data
info, --info display information about a cover- or stego-file
info <filename> display information about <filename>
encinfo, --encinfo display a list of supported encryption algorithms
version, --version display version information
license, --license display steghide's license
help, --help display this usage information
embedding options:
-ef, --embedfile select file to be embedded
-ef <filename> embed the file <filename>
-cf, --coverfile select cover-file
-cf <filename> embed into the file <filename>
-p, --passphrase specify passphrase
-p <passphrase> use <passphrase> to embed data
-sf, --stegofile select stego file
-sf <filename> write result to <filename> instead of cover-file
-e, --encryption select encryption parameters
-e <a>[<m>]|<m>[<a>] specify an encryption algorithm and/or mode
-e none do not encrypt data before embedding
-z, --compress compress data before embedding (default)
-z <l> using level <l> (1 best speed...9 best compression)
-Z, --dontcompress do not compress data before embedding
-K, --nochecksum do not embed crc32 checksum of embedded data
-N, --dontembedname do not embed the name of the original file
-f, --force overwrite existing files
-q, --quiet suppress information messages
-v, --verbose display detailed information
extracting options:
-sf, --stegofile select stego file
-sf <filename> extract data from <filename>
-p, --passphrase specify passphrase
-p <passphrase> use <passphrase> to extract data
-xf, --extractfile select file name for extracted data
-xf <filename> write the extracted data to <filename>
-f, --force overwrite existing files
-q, --quiet suppress information messages
-v, --verbose display detailed information
options for the info command:
-p, --passphrase specify passphrase
-p <passphrase> use <passphrase> to get info about embedded data
To embed emb.txt in cvr.jpg: steghide embed -cf cvr.jpg -ef emb.txt
To extract embedded data from stg.jpg: steghide extract -sf stg.jpg
实验材料
将 secret.txt 的信息嵌入到 moon.jpg 里面,合成图种(内涵图)
z@ubuntu:~$ steghide embed -cf moon.jpg -ef secret.txt
z@ubuntu:~$ steghide info moon.jpg
处于安全考虑将图种和原始秘密文件分开保存(或直接删除原始文件,只保留图种),为了真实模拟我已将原始秘密文件删除。
在需要读取秘密文件的时候,使用下面的命令将原是秘密文件取出。
z@ubuntu:~$ steghide extract -sf moon.jpg