On Sep 12, 2007, at 7:06 AM, Udhay Shankar N wrote:
Sounds like an interesting idea - using SRAM state as a source of randomness. Any of the folks here willing to comment on this?
If you care about your randomness, you don't want to be making the assumption that a source is random because "it sometimes looks that way, sort of". You want to be using a source that's assumed random because, as far as you know, it's very hard for it to be any other way.
Clearly, SRAM state falls into the former category, and there are lots and lots of variables keeping it firmly outside the latter. This means the usual wisdom applies: if you really need the extra entropy, mix some of these SRAM state bits into your pool, but make sure you're also feeding the pool from at least one source about whose randomness you can reason strongly.
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