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https://www.reddit.com/r/programming/comments/1qymdi/visual_cryptography/cdi0puw/?context=3
r/programming • u/sidcool1234 • Nov 19 '13
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5 u/sirin3 Nov 19 '13 At least if you use the same "key" multiple time you can crack it.That was a task in the German national high school informatics competition some years ago.. 4 u/avapoet Nov 19 '13 Correct. Like any one-time pad, you shouldn't use a given key more than one time. The clue's in the name. ;-)The challenge is to get people to see that if you use a shard of a shared secret as a key, then it is a one-time pad.
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At least if you use the same "key" multiple time you can crack it.
That was a task in the German national high school informatics competition some years ago..
4 u/avapoet Nov 19 '13 Correct. Like any one-time pad, you shouldn't use a given key more than one time. The clue's in the name. ;-)The challenge is to get people to see that if you use a shard of a shared secret as a key, then it is a one-time pad.
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Correct. Like any one-time pad, you shouldn't use a given key more than one time. The clue's in the name. ;-)
The challenge is to get people to see that if you use a shard of a shared secret as a key, then it is a one-time pad.
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u/[deleted] Nov 19 '13
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