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I'm already using some encryption modes: AES, RCA etc. I want to try to encrypt text into some king of image. Is it even possible? Maybe there's some sources with information.

And also is there a way to encrypt text as sound (maybe just some beeps)?
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Solution 1

Yes, it's possible. See this[^] set of articles about steganography.

In particular, see Corrina's 19-part series[^] on the subject.

/ravi
   
v2
Comments
Sergey Alexandrovich Kryukov 20-Apr-15 18:31pm
   
Makes sense, a 5.
See also my answer on audio. :-)
—SA
Ravi Bhavnani 20-Apr-15 20:03pm
   
Good point - 5'd back! :)

/ravi
Sergey Alexandrovich Kryukov 20-Apr-15 22:05pm
   
Thank you, Ravi.
As to "back", I hope we and our readers understand that we don't do reciprocal favors but are trying to vote on some post based on their value, as we understand it, everything which makes the posts interesting or not.
—SA
Ravi Bhavnani 21-Apr-15 7:51am
   
Absolutely. My 5 was for the link to more details about the aspect of audio.

/ravi
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Solution 2

In essence, text as sound already exists: http://en.wikipedia.org/wiki/Morse_code.

And you can even shift it to non-audible signal and mix with normal human-perceivable audio. Most certainly, this is far from some optimal solution, but it could give you some ideas. :-)

—SA
   

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