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Can one hide a text in an image and then hide that image in another image? [on hold]

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Using a steganographic algorithm like least significant bit, can one hide a text in an image and then hide that image in another image?

steganography

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edited 2 days ago

Rodrigo de Azevedo

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asked Apr 25 at 6:50

Paps JhonPaps Jhon

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put on hold as off-topic by e-sushi, AleksanderRas, Maarten Bodewes♦ 2 days ago

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "Programming questions are off-topic even if you are writing or debugging cryptographic code. Unless your question is specifically about how the cryptographic algorithm, protocol or side-channel (mitigation) works, you should look into asking on Stack Overflow instead." – e-sushi, AleksanderRas

If this question can be reworded to fit the rules in the help center, please edit the question.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Daniel has already answered. I suspect however that if you have already found the image hidden in the other image that stenography is now kind expected, removing most of the surprise factor. So while it is possible, it is questionable if such a scheme makes any sense.
  $endgroup$
  – Maarten Bodewes♦
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  I'm voting to close this question as off-topic because questions about steganography are only valid if they are about keyed steganography, as that would make them a form of cryptography. More information here
  $endgroup$
  – Maarten Bodewes♦
  2 days ago
  

  
  
  
  

add a comment | 

2

$begingroup$

Using a steganographic algorithm like least significant bit, can one hide a text in an image and then hide that image in another image?

steganography

share|improve this question

edited 2 days ago

Rodrigo de Azevedo

1356

asked Apr 25 at 6:50

Paps JhonPaps Jhon

141

New contributor

Paps Jhon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

put on hold as off-topic by e-sushi, AleksanderRas, Maarten Bodewes♦ 2 days ago

This question appears to be off-topic. The users who voted to close gave this specific reason:

• "Programming questions are off-topic even if you are writing or debugging cryptographic code. Unless your question is specifically about how the cryptographic algorithm, protocol or side-channel (mitigation) works, you should look into asking on Stack Overflow instead." – e-sushi, AleksanderRas

If this question can be reworded to fit the rules in the help center, please edit the question.

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  $begingroup$
  Daniel has already answered. I suspect however that if you have already found the image hidden in the other image that stenography is now kind expected, removing most of the surprise factor. So while it is possible, it is questionable if such a scheme makes any sense.
  $endgroup$
  – Maarten Bodewes♦
  2 days ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  I'm voting to close this question as off-topic because questions about steganography are only valid if they are about keyed steganography, as that would make them a form of cryptography. More information here
  $endgroup$
  – Maarten Bodewes♦
  2 days ago
  

  
  
  
  

add a comment | 

$begingroup$

Using a steganographic algorithm like least significant bit, can one hide a text in an image and then hide that image in another image?

steganography

share|improve this question

edited 2 days ago

Rodrigo de Azevedo

1356

asked Apr 25 at 6:50

Paps JhonPaps Jhon

141

New contributor

Paps Jhon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|improve this question

edited 2 days ago

Rodrigo de Azevedo

1356

asked Apr 25 at 6:50

Paps JhonPaps Jhon

141

New contributor

Paps Jhon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 2 days ago

Rodrigo de Azevedo

1356

asked Apr 25 at 6:50

Paps JhonPaps Jhon

141

New contributor

Paps Jhon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 2 days ago

Rodrigo de Azevedo

1356

edited 2 days ago

Rodrigo de Azevedo

1356

asked Apr 25 at 6:50

Paps JhonPaps Jhon

141

New contributor

Paps Jhon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked Apr 25 at 6:50

Paps JhonPaps Jhon

141

1 Answer
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$begingroup$

Yes!

For bitmap images, if you use all the pixels of the image (bad idea, it's very detectable) you need a first image 8/3 times bigger than the size of the text you want to hide (you can compress it).

• 8 because you need 8 pixels to hide one byte (one bit per pixel).


• 1/3 with color images, because you can hide a bit per channel/pixel.

After this, you can hide this image into another image 8 times bigger (again, 1 byte into 8 pixels).

For JPEG images the approach is different, because you are hiding information into the DCT coefficients. But it's the same idea.

share|improve this answer

edited Apr 25 at 15:37

Ella Rose♦

17.1k44586

answered Apr 25 at 7:41

Daniel LerchDaniel Lerch

26624

$endgroup$

add a comment | 

4

$begingroup$

Yes!

For bitmap images, if you use all the pixels of the image (bad idea, it's very detectable) you need a first image 8/3 times bigger than the size of the text you want to hide (you can compress it).

• 8 because you need 8 pixels to hide one byte (one bit per pixel).


• 1/3 with color images, because you can hide a bit per channel/pixel.

After this, you can hide this image into another image 8 times bigger (again, 1 byte into 8 pixels).

For JPEG images the approach is different, because you are hiding information into the DCT coefficients. But it's the same idea.

share|improve this answer

edited Apr 25 at 15:37

Ella Rose♦

17.1k44586

answered Apr 25 at 7:41

Daniel LerchDaniel Lerch

26624

$endgroup$

add a comment | 

4

$begingroup$

Yes!

For bitmap images, if you use all the pixels of the image (bad idea, it's very detectable) you need a first image 8/3 times bigger than the size of the text you want to hide (you can compress it).

• 8 because you need 8 pixels to hide one byte (one bit per pixel).


• 1/3 with color images, because you can hide a bit per channel/pixel.

After this, you can hide this image into another image 8 times bigger (again, 1 byte into 8 pixels).

For JPEG images the approach is different, because you are hiding information into the DCT coefficients. But it's the same idea.

share|improve this answer

edited Apr 25 at 15:37

Ella Rose♦

17.1k44586

answered Apr 25 at 7:41

Daniel LerchDaniel Lerch

26624

$endgroup$

add a comment | 

$begingroup$

Yes!

For bitmap images, if you use all the pixels of the image (bad idea, it's very detectable) you need a first image 8/3 times bigger than the size of the text you want to hide (you can compress it).

• 8 because you need 8 pixels to hide one byte (one bit per pixel).


• 1/3 with color images, because you can hide a bit per channel/pixel.

After this, you can hide this image into another image 8 times bigger (again, 1 byte into 8 pixels).

For JPEG images the approach is different, because you are hiding information into the DCT coefficients. But it's the same idea.

share|improve this answer

edited Apr 25 at 15:37

Ella Rose♦

17.1k44586

answered Apr 25 at 7:41

Daniel LerchDaniel Lerch

26624

$endgroup$

share|improve this answer

edited Apr 25 at 15:37

Ella Rose♦

17.1k44586

answered Apr 25 at 7:41

Daniel LerchDaniel Lerch

26624

edited Apr 25 at 15:37

Ella Rose♦

17.1k44586

edited Apr 25 at 15:37

Ella Rose♦

17.1k44586

answered Apr 25 at 7:41

Daniel LerchDaniel Lerch

26624

answered Apr 25 at 7:41

Daniel LerchDaniel Lerch

26624