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Old Main Augustana.jpg
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Topic: Old Main Augustana.jpg (Read 994 times)
amaclin
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Old Main Augustana.jpg
July 06, 2017, 08:31:34 PM
#1
https://blockchain.info/tx/033d185d1a04c4bd6de9bb23985f8c15aa46234206ad29101c31f4b33f1a0e49
tspacepilot
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Re: Old Main Augustana.jpg
July 10, 2017, 06:45:05 PM
#2
Okay, I'll bite, I'm curious.
I see this in OP RETURN:
"jLN Augustana College Old-Main.jpg Reconstruct with data preceding redeemscripts"
So I guess you've got the jpeg file in there somewhere (I didn't look at the whole raw transaction or try finding it).
What was the point here? What am I missing?
amaclin
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Re: Old Main Augustana.jpg
July 10, 2017, 06:50:07 PM
#3
the image is encoded in scriptSigs as raw binary chunks.
this is a method to store in blockchain more than 80 bytes of data as in OP_RETURN output
(I am not a sender/creator of this transaction)
dE7ERV
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Re: Old Main Augustana.jpg
July 11, 2017, 11:57:14 PM
#4
Is there a purpose to putting images in tx? Or just for testing capabilities?
readerbtc
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Re: Old Main Augustana.jpg
July 12, 2017, 01:47:15 AM
#5
I think the purpose is to sabotate the blockchain uploading illegal images.
systemv
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Re: Old Main Augustana.jpg
July 12, 2017, 02:59:52 PM
#6
Fascinating. I wonder if somebody played with opposite case - steganography related to blockchain. Hiding a private key inside a picture or using picture as a seed to generate key it would be interesting...
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tspacepilot
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Re: Old Main Augustana.jpg
July 12, 2017, 04:14:44 PM
#7
Quote from: systemv on July 12, 2017, 02:59:52 PM
Fascinating. I wonder if somebody played with opposite case - steganography related to blockchain. Hiding a private key inside a picture or using picture as a seed to generate key it would be interesting...
The latter is trivially easy, right?
Code:
$ cat dispicture.jpg | sha256sum | privkeytowif.sh
amaclin
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Re: Old Main Augustana.jpg
July 12, 2017, 04:40:09 PM
#8
Please note, that the image was slightly changed by image hosting site imgur.com
You should decode binary from the transaction yourself to find anything intersting
I think that there is no steganography in it.
If you want private keys - you can take them from my forum signature
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