Subject: Re: NFS file handles are guessable.
To: der Mouse <email@example.com>
From: Rafal Boni <firstname.lastname@example.org>
Date: 03/31/1997 23:17:13
In message <199704010338.WAA22427@Twig.Rodents.Montreal.QC.CA>, you write:
-> >>> Will this be "exportable"?
-> >> There does not appear to be any text in the current crypto
-> >> regulations which specifically control the export of random number
-> >> generators.
-> Question: what's the difference between a stream cipher and a
-> cryptographic-strength random number generator?
-> Answer: not much.
Algorithmically, yes. However, if the PRNG is designed in such a way
that makes it hard for you to use it as a stream cipher (ie, use of
a one-way function that makes it hard to "work upstream") the ITAR
folks may be nicer to you when you want to export it (after all,
the 4.4BSD-derived OS'es now ship DES in the non-US libcrypt, with
the difference being that the domestic libcrypt performs decryption
while the export one does a "return (1); /* always fail */").
(Actually, I'm in awe that the NSA let the CSRG and descendants export even
that... Berzerkeley must have been owed some favors 8-)
Rafal Boni email@example.com