An amature cryptographer posted a new block cipher called xcrush. Usually I ignore these posts, but seeing as this guy knew it to be an educational exercise and made a somewhat digestable document I took the bait.
A common question to ask is if the key expansion function is injective. This is important because a non-injective key expansion function means two keys result in the same block cipher operation, and thus the security
| ### Keybase proof | |
| I hereby claim: | |
| * I am tommd on github. | |
| * I am tommd (https://keybase.io/tommd) on keybase. | |
| * I have a public key whose fingerprint is 8BC2 FE48 95E8 2B82 4E1D 9EB6 DA9F 2B24 F69F B294 | |
| To claim this, I am signing this object: |
| module LazyDemo where | |
| import Vision.Image.JuicyPixels | |
| import Vision.Image (RGBA) | |
| import Codec.FFmpeg | |
| import System.IO.Unsafe | |
| lazyStream :: FilePath -> IO [RGBA] | |
| lazyStream fp = do | |
| initFFmpeg |