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Date: Wed, 03 Sep 2014 17:37:27 -0400 From: Bill Cox <waywardgeek@...hershed.org> To: discussions@...sword-hashing.net Subject: Cryptographically strong salt is not overkill -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I just started poking into the Makwa code. I'm still not sure if I'm qualified to review it, but I can always comment on code. I saw the following comment: /* * A cryptographically strong PRNG is kinda overkill for a salt, * but it does not hurt to use one. */ This is not true! If any salt generator that produces data that is distinguishable from random data makes it into CipherShed, I will be pretty pissed off. Don't forget that some users have a valid need to store the salt in plain-text without letting an attacker know that it is in fact not just random data. This is a critical feature for both stenography and plausible deniability. Detectable salt would destroy the hidden volume feature CipheShed inherits from TrueCrypt. That said, I haven't reviewed the CipherShed code yet like I'm reviewing this code... Bill -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJUB4oUAAoJEAcQZQdOpZUZN/QP+wXeriWdZfE87J8TWzwAJKCe ijObrur8zl9IZUmtFhQkaYdpPzhYCFUpas0z94Ndv/K5I3OTNYiRP7rmcdT873Rz FMGqY0a59T09JgPtFEP+DrtnJV26RieGRITRsZEW2WpkNV4x8WOHMOh6j3DPls5V qSzCLxE46U6eIo97EeZE22qxfBdQncHBGGe9OLiDT05ECtcV7FInzi3B5bz1zCOj g2zTs6hcPdROpi7/YlQqkl0D8fDBdxlFS6BqjA91tp6JmKFbtpGKW0FEARdUiSFx TReV14BR9OKQe0OeBHDO2i7qKMqENBb+RRT9K9eHr7u2811dHhlH0TRxkuh0vMUJ 6aOxdYdKYJfKZtizO/ttmCp4S5gPbDQrJKb7KPB9b7DMsniCV24FvDso6vkLTOFw eBeG/wFkk0n1g0Nxdq4Ell2rgWJDO9zvolSq1nlsRgYNh2ar4qaBHTl/th7n5d2y buuYRVHPF0pcUbc4RVl64jbanNLC+3FwYKNnd4/ljoVKJdQV0wiD8AGBThXTp2O7 Iun0/XietuKsQ0dkn/2dTLP9ZmSkyYmQRf5FMm8go562GK0TdB7qi8Pcu8MZQ5H4 TH0isrDsDvrewsE0XkyFi3+hnPf83ZW3b9WOFTBsqbnmwnOQaGPRqYE1GTgDcrzP UdqEcc33KfsxwV8Sv2pB =xf/3 -----END PGP SIGNATURE-----
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