text_blind_watermark

Put message(blind watermark) into a text. so that the message is invisible, and the changes of the text are not perceptible.

• Video demo：https://www.bilibili.com/video/BV1m3411s7kT
• Online demo(from old version, for demo only): https://www.guofei.site/pictures_for_blog/app/text_watermark/v1.html
• 中文 readme README_cn.md
• Source code: https://github.com/guofei9987/text_blind_watermark
• Rust Version: https://github.com/guofei9987/hidden_watermark

Can be used in

• Wechat
• dingding
• zhihu.com
• ...

How to Use

install

>pip install text_blind_watermark

embed message into text:

from text_blind_watermark import TextBlindWatermark2

password = '20190808'
text = '这句话中有盲水印，你能提取出来吗？'
watermark = 'github.com/guofei9987'

text_blind_wm = TextBlindWatermark2(password=password)

text_with_wm = text_blind_wm.embed(text=text, watermark=watermark)
print(text_with_wm)

extract message from text

text_blind_wm2 = TextBlindWatermark2(password=password)
wm_extract = text_blind_wm2.extract(text_with_wm)
print('提取内容：', wm_extract)

github.com/guofei9987

chr_type

You can choose different type to get better performance.

from text_blind_watermark import TextBlindWatermark2

password = '20190808'
text = '这句话中有盲水印，你能提取出来吗？'
watermark = 'github.com/guofei9987'

text_blind_wm = TextBlindWatermark2(password=password, chr_type=(3, 4))

text_with_wm = text_blind_wm.embed(text=text, watermark=watermark)
print(text_with_wm)

text_blind_wm2 = TextBlindWatermark2(password=password, chr_type=(3, 4))
wm_extract = text_blind_wm2.extract(text_with_wm)
print('提取内容：', wm_extract)
assert watermark == wm_extract

Another algorithm is more robust

Alice Put her text watermark into a text:

from text_blind_watermark import TextBlindWatermark

watermark = "绝密：两点老地方见！"
text = "这句话中有盲水印，你能提取出来吗？" * 16
password = "20190808"

twm = TextBlindWatermark(password=password)
twm.read_wm(watermark=watermark)
twm.read_text(text=text)
text_embed = twm.embed()

print("打上盲水印之后:")
print(text_embed)

Then, you can paste this text to where you need.

Bob Extract the invisible watermark

from text_blind_watermark import TextBlindWatermark
password = "20190808"

twm_new = TextBlindWatermark(password=password)
wm_extract = twm_new.extract(text_embed)
print("解出的盲水印：")
print(wm_extract)

Related Project

HideInfo：https://github.com/guofei9987/HideInfo

算法	说明
migrate tank	使图片在不同的背景下显示不同的图片
hide as image	把数据以图片形式存放
hide in image	把数据藏在一个图片中
image seed	把图片和文件黏在一起，并存为图片
EXIF	把一段信息放到图片的EXIF中
hide as music	把数据以音频的形式存放
hide in music	把数据隐藏在一个音频中
hide as text	把数据以文本文件的形式存放
hide in text	把数据隐藏在一段文本中