Hello All, I have published the first version of stego-uuid. https://hackage.haskell.org/package/stego-uuid-1.0.0.0 stego-uuid allows one to secretly mark 128-bit UUIDs. When created from a random 64-bit number, the whole 128-bit UUID will look random to everyone, except those who know the secret detection key. For more details and usage examples, please refer to the documentation on hackage. Regards, Dimitri -- 2E45 D376 A744 C671 5100 A261 210B 8461 0FB0 CA1F