Re: Selecting parameters for LCGs

David R. Conrad (drc@adni.net)
Sat, 6 Feb 1999 06:43:52 -0500 (EST)

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Jim used CSPRNG to mean "Cryptographically Strong PRNG".
bram used CSPRNG to mean "Continually Seeded PRNG".

On Thu, 4 Feb 1999, Bill Frantz wrote:
> At 4:16 PM -0700 2/3/99, bram wrote:
> >Someone posted here that he uses CSPRNG to refer to random number
> >generators which you can feed entropy bits into at any time, ....
>
> I thought I had coined the phrase, but I seem to remember seeing it used in
> Applied Cryptography (version 2), so I guess it is Schneier's. My copy is
> at work, so I can't chase down the reference.

AC2 pre-fifth-printing, p. 78:

"cryptographically secure pseudo-random-number generator"

Ibid., p. 45:

"Cryptographically Secure Pseudo-Random Sequences"
"cryptographically secure pseudo-random"
"cryptographically secure pseudo-random sequence generator"

I didn't find the acronym, or any acronym, used for this at this point, or
in the index, or at one or two other spots I checked for it (specifically
around pp. 421-428).

I believe it was bram who mentioned that the paper on counterpane.com
simply used PRNG. I looked through various readme's in Yarrow0.8.71.zip
and couldn't find any other acronym but PRNG used.

I think that CFPRNG is too likely to be confused with CSPRNG, and FWIW
I'll suggest Actively Seeded Pseudo-Random Number Generator, or ASPRNG.
If all these acronyms give you a headache, take two ASPRNG and call me
in the morning. :-)

David R. Conrad <drc@adni.net> PGP keys (0x1993E1AE and 0xA0B83D31):
DSS Fingerprint20 = 9942 E27C 3966 9FB8 5058 73A4 83CE 62EF 1993 E1AE
RSA Fingerprint16 = 1D F2 F3 90 DA CA 35 5D 91 E4 09 45 95 C8 20 F1
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