Tag Archives: Image

Secure way of masking out sensitive information in screenshots? [duplicate]

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This question already has an answer here:

As a guy working in security/pentest, I regularly take screenshots of exposed passwords/sensitive information. Whenever I report these, I mask parts or complete info as in the sample given below

test_image

I often wonder, is it possible for someone to ‘reverse engineer’ these pics and recover the original information? If so, what should be the correct way of masking such kind of info?

I am using shutter for taking screenshots and using accompanied edit tool to add the black stroke.

EDIT:

As pointed out by some of you, my question is different from this since:

  • I am not asking about MS paint/black strokes. The image is just an
    example to better explain the question
  • I have clearly asked for the correct/most secure way of producing
    photographic evidence.

Continue reading Secure way of masking out sensitive information in screenshots? [duplicate]→

to Edit TPVD(Tri – Pixel value difference) image steganography from 2×2 to 3×3 matrix

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i want to modify TPVD matrix from 2×2 to 3×3 but how i can change ??? matrix g

g=a(1+x:2+x,1+y:2+y);

g=double(g);
d0=g(1,2)-g(1,1);
d1=g(2,1)-g(1,1);
d2=g(2,2)-g(1,1);
lk=[0 8 16 32 64 128];
uk=[7 15 31 63 127 255 ];

… Continue reading to Edit TPVD(Tri – Pixel value difference) image steganography from 2×2 to 3×3 matrix→