So many people are getting the SHA1 story wrong. With the collision that Google released, *anyone* can create colliding PDFs for *free*.
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You can use an arbitrary tail after the first 320 bytes but it has to be the *same* on both files for the hashes to match.
The trick is that you can make that same tail contain two different images which are selected based on the collision blocks.
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right, ok, so you have to engineer the tail just right, given you know where both collisions will direct. Thank you!
Thanks. Twitter will use this to make your timeline better. UndoUndo
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