[Cryptography] Photon beam splitters for "true" random number generation ?
ron at flownet.com
Sun Dec 27 14:59:50 EST 2015
On Dec 27, 2015, at 6:54 AM, ianG <iang at iang.org> wrote:
> The process we developed at CAcert was:
> 1. Everyone brings their favourite RNG on their laptop. I used laptop photos of a white card in lowlight, similar to above, and hashed every photo. One person used John Denker's audio device. Another used the OpenSSL RNG ;-)
> 2. Each feed was then transferred on USB stick to a single offline computer.
> 3. All feeds were then combined (XOR'd together and hashed) by a 1 page C program. Result was fed into the key generation process.
Concatenation would be more secure than XOR. XOR can actually lose entropy if two of your sources are correlated. Concatenation (followed by a hash) doesn’t have that problem.
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