Invisible

Embed noise or hidden message to text.

Add noise

$ invisible add-noise < example/plain.txt > example/noised.txt

It looks normal. But the size is grown from 446 bytes to 1070 bytes by noise.

L⁡o​rem⁣ ⁢ip​sum ⁡d​olor⁡ ⁠sit⁡ a​met⁣, ⁠c‌ons⁠ectet⁢ur⁠ ⁣a⁤di⁡p⁣isci‌n‌g e‌li⁢t,‌ ⁢se​d d⁡o‌ e​i⁡u⁠smo⁢d⁡ ​t⁠em⁡po​r in⁠cididu‌n⁡t ⁢u⁡t labo⁠re ​e⁡t​ ‌dolo⁣re​ mag‌n⁡a⁠ al⁣i​qua.⁡ ⁤Ut en​im ad⁤ ‌minim ⁡v⁢e⁣ni‌am, qui⁤s ⁢n⁡os⁣trud‌ ⁢e⁣xe‌rc⁠itati⁣on ‌u⁢l‌l⁢a​mc⁠o⁠ laboris n​i⁤si⁡ ​ut⁠ ⁢a⁠liq‌u​i⁣p e‌x e⁠a⁡ c‌ommo⁠do⁤ con⁤s⁣e⁠q⁡uat⁠. Duis aute iru⁠r⁤e ⁤d‌olor ⁤i⁣n⁢ ⁡r⁠e​pr​eh⁡end⁤e⁠rit⁣ i⁣n⁣ vo⁡l⁣uptate⁠ v‌el⁣it ​e⁢s⁡s⁡e⁠ ⁠cil⁢l‌u​m dol​ore⁢ ​e⁢u ⁠f​u⁤gi​a⁢t‌ ⁠n⁠ulla par⁣iat​u⁠r​. ‌Except‌e​ur⁢ ⁤sin​t⁠ occaecat cu​pid⁢a⁠tat ⁤n⁡o⁣n⁤ ⁠proide‌nt, ​sunt⁤ ⁡i‌n cu⁡lp⁤a ⁢qui‌ off​ic⁢i‌a dese​run​t ‌mo‌l⁢li⁡t⁣ ​a⁢ni⁤m⁣ ​id ⁡est l⁤abo⁡r​u⁢m.

Encode

$ invisible encode -m 'Hello, World!' < example/plain.txt > example/embeded.txt

Encoded text

It looks normal. But the hidden message is in.

L⁠o⁠r​e⁤m⁠ ⁣i⁣p⁢s⁡u⁡m​ ⁤do⁢l⁣o⁢r‌ ​s​i⁣t⁡ ⁣a⁣me⁡t⁢,⁢ ⁤c⁤o‌n⁢s⁢e‌c​t⁠e​t​u​r​ ​a⁠d⁠i​p⁤i⁠s⁣c⁣i⁢n⁡g⁡ ​e⁤li⁢t⁣,⁢ ‌s​e​d⁣ ⁡d⁣o⁣ e⁡i⁢u⁢s⁤m⁤o‌d⁢ ⁢t‌e​m⁠p​o​r​ ​i​n⁠c⁠i​d⁤i⁠d⁣u⁣n⁢t⁡ ⁡u​t⁤ l⁢a⁣b⁢o‌r​e​ ⁣e⁡t⁣ ⁣do⁡l⁢o⁢r⁤e⁤ ‌m⁢a⁢g‌n​a⁠ ​a​l​i​q​u⁠a⁠.​ ⁤U⁠t⁣ ⁣e⁢n⁡i⁡m​ ⁤ad⁢ ⁣m⁢i‌n​i​m⁣ ⁡v⁣e⁣ni⁡a⁢m⁢,⁤ ⁤q‌u⁢i⁢s‌ ​n⁠o​s​t​r​u​d⁠ ⁠e​x⁤e⁠r⁣c⁣i⁢t⁡a⁡t​i⁤on⁢ ⁣u⁢l‌l​a​m⁣c⁡o⁣ ⁣la⁡b⁢o⁢r⁤i⁤s‌ ⁢n⁢i‌s​i⁠ ​u​t​ ​a​l⁠i⁠q​u⁤i⁠p⁣ ⁣e⁢x⁡ ⁡e​a⁤ c⁢o⁣m⁢m‌o​d​o⁣ ⁡c⁣o⁣ns⁡e⁢q⁢u⁤a⁤t‌.⁢ ⁢D‌u​i⁠s​ ​a​u​t​e⁠ ⁠i​r⁤u⁠r⁣e⁣ ⁢d⁡o⁡l​o⁤r ⁢i⁣n⁢ ‌r​e​p⁣r⁡e⁣h⁣en⁡d⁢e⁢r⁤i⁤t‌ ⁢i⁢n‌ ​v⁠o​l​u​p​t​a⁠t⁠e​ ⁤v⁠e⁣l⁣i⁢t⁡ ⁡e​s⁤se⁢ ⁣c⁢i‌l​l​u⁣m⁡ ⁣d⁣ol⁡o⁢r⁢e⁤ ⁤e‌u⁢ ⁢f‌u​g⁠i​a​t​ ​n​u⁠l⁠l​a⁤ ⁠p⁣a⁣r⁢i⁡a⁡t​u⁤r.⁢ ⁣E⁢x‌c​e​p⁣t⁡e⁣u⁣r ⁡s⁢i⁢n⁤t⁤ ‌o⁢c⁢c‌a​e⁠c​a​t​ ​c​u⁠p⁠i​d⁤a⁠t⁣a⁣t⁢ ⁡n⁡o​n⁤ p⁢r⁣o⁢i‌d​e​n⁣t⁡,⁣ ⁣su⁡n⁢t⁢ ⁤i⁤n‌ ⁢c⁢u‌l​p⁠a​ ​q​u​i​ ⁠o⁠f​f⁤i⁠c⁣i⁣a⁢ ⁡d⁡e​s⁤er⁢u⁣n⁢t‌ ​m​o⁣l⁡l⁣i⁣t ⁡a⁢n⁢i⁤m⁤ ‌i⁢d⁢ ‌e​s⁠t​ ​l​a​b​o⁠r⁠u​m⁤.⁠
⁣⁣⁢⁡⁡​⁤⁢⁣⁢‌​​⁣⁡⁣⁣⁡⁢⁢⁤⁤‌⁢⁢‌​⁠​​​​​

Decode

$ invisible decode < example/embeded.txt
Hello, World!Hello, World!Hello, World!Hello, World!Hello, World!Hello, World!Hello, World!Hello, World!Hello, World!Hello, World!Hello, World!Hello, World!

LICENSE

Source

The 3-Clause BSD License. See also LICENSE file.