Re: Quantum RNG (was: Use of TPM chip for RNG)
On 7/4/06, Taral [EMAIL PROTECTED] wrote: On 7/4/06, Andrea Pasquinucci [EMAIL PROTECTED] wrote: About RNG, does someone in the list have any comment, ideas on this http://www.idquantique.com/products/quantis.htm Why? Noise-based RNGs are just as random and just as quantum. :) Hella fast. Most of the RNGs based on electrical noise are not particularly pure -- some even use noisy diodes, which are decidedly predictable. Those that bother to isolate out one noise phenomenon or another sacrifice speed, and the average consumer won't have the technical background to judge them on anything else. Sampling faster gives more bits, but no more randomness. Overall, you're going to be limited by temperature with electrical noise phenomena. On the other hand, the quantis device appears to be simple, straightforward, and clean. But it's all sealed up in an opaque container. I asked them some questions about it and the person I was speaking with didn't seem to understand why anyone would care about what's in the module. Note that they sell QC endpoints as well. Very interesting company. -- Resolve is what distinguishes a person who has failed from a failure. Unix guru for sale or rent - http://www.lightconsulting.com/~travis/ -- GPG fingerprint: 9D3F 395A DAC5 5CCC 9066 151D 0A6B 4098 0C55 1484 - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Quantum RNG
-- Andrea Pasquinucci wrote: About RNG, does someone in the list have any comment, ideas on this http://www.idquantique.com/products/quantis.htm Quantis is a physical random number generator exploiting an elementary quantum optics process. Photons - light particles - are sent one by one onto a semi-transparent mirror and detected. The exclusive events (reflection - transmission) are associated to 0 - 1 bit values. That is doing it the hard way. The easy way is to amplify shot noise or Johnson noise and feed it into a shift register, with the output of the shift register being mixed back in with the noise input, so that the shift register contains a constant pool of continually stirred entropy with fresh entropy being continually stirred in. When people use an microphone input with no microphone as their major entropy source, they are using Johnson noise as their entropy source, and doing the stirring in software. --digsig James A. Donald 6YeGpsZR+nOTh/cGwvITnSR3TdzclVpR0+pr3YYQdkG 2PU8nEsxKqJuKTcJtk5EoKYjFF0Uh/9Xr5sJ6nxm 4YaYrOcfMCcakjCz0TyfilHAYuMSbGUG2qHHdxLBA - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Quantum RNG (was: Use of TPM chip for RNG)
About RNG, does someone in the list have any comment, ideas on this http://www.idquantique.com/products/quantis.htm Quantis is a physical random number generator exploiting an elementary quantum optics process. Photons - light particles - are sent one by one onto a semi-transparent mirror and detected. The exclusive events (reflection - transmission) are associated to 0 - 1 bit values. Just curious of your opinion. Andrea -- Andrea Pasquinucci [EMAIL PROTECTED] PGP key: http://www.ucci.it/ucci_pub_key.asc fingerprint = 569B 37F6 45A4 1A17 E06F CCBB CB51 2983 6494 0DA2 - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Quantum RNG
Andrea Pasquinucci wrote: http://www.idquantique.com/products/quantis.htm Quantis is a physical random number generator exploiting an elementary quantum optics process. Photons - light particles - are sent one by one onto a semi-transparent mirror and detected. The exclusive events (reflection - transmission) are associated to 0 - 1 bit values. Just curious of your opinion. This is discussed at http://www.av8n.com/turbid/paper/turbid.htm#sec-hrng-attack Quantum processes are in some very narrow theoretical sense more fundamentally random than other sources of randomness, such as thermal noise ... but they are not better in any practical sense. The basic quantum process is less sensitive to temperature than a purely thermal process ... but temperature dependence is easily accounted for in any practical situation, and -- more importantly -- there are all sorts of other practical considerations (such as detector dead-time issues) that make real quantum detectors far from ideal. The devil is in the details, and obtaining the raw data from a quantum process is nowhere near necessary and nowhere near sufficient to make a good randomness generator. I have no idea whether the quantis generator got the devilish details right ... but in any case, there are easier ways to make a generator that is just as good, or better. For details, see http://www.av8n.com/turbid/paper/turbid.htm - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Quantum RNG (was: Use of TPM chip for RNG)
On 7/4/06, Andrea Pasquinucci [EMAIL PROTECTED] wrote: About RNG, does someone in the list have any comment, ideas on this http://www.idquantique.com/products/quantis.htm Why? Noise-based RNGs are just as random and just as quantum. :) -- Taral [EMAIL PROTECTED] You can't prove anything. -- Gödel's Incompetence Theorem - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
