-----BEGIN PGP SIGNED MESSAGE----- On Thu, 27 Jul 1995, Andy Brown wrote:
Your scheme should be OK. If you'd chosen the same IV for each sector then identical sectors would encrypt the same. If I remember rightly then having a known IV only affects the security of the first block, after that the ciphertext chaining comes into effect.
I suspected as much. I don't see how a known IV affects the security of the first block even (and perhaps I'm exposing some real crypto-ignorance here :). Someone pointed out in private mail that the SFS docs have a good section on IV selection techniques...I'll go off and read those. == Johnathan Corgan "For the first time in history, it is possible to jcorgan@aeinet.com have absolute privacy over arbitrary distances." PGP Key Fingerprint: 4F 28 69 B8 76 2E 42 3E 8B 4C 12 BB 3A 43 D4 07 -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQEUAwUBMBfGZelPfVlQ1n99AQFcswf470WxqWkne0OPdCeKcc8Gaei7AIeKUg// CzrgD6ATPLrpMZcmNCMtv0cY4jo3tUnbJI50plyuda8v8Hlyc5l1ejSO0YoOBZrs ICFhQfXp6bpPxV8ZFKozKo1N3RlcpgtArMZqoKZ4jfg3kMCTtBU2bc7Kh793sk3d EXS2GcPpXYUiTMJ53IJyBXcl2KX1MnCUkWVeal8D9kGY4/8pfJFLWuqBpsUDCQsW yamvhcDiltCD6ukRwQ7Vpu3dWCn0ZxjWg0emg/toqNNdKB950Bh+dlgd5z/LabTn 4eSPdqeWQW/W96cShm1y73AbGM8hJWWAuMKrFuaoyR1ilIis03eT =sheZ -----END PGP SIGNATURE-----