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location Canada
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visits member for 2 years, 4 months
seen Oct 13 '13 at 19:52

Geek, gamer, skeptic.


Oct
12
comment How exactly is “true randomness” defined in the realms of cryptography?
Merely deleting portions of a selection of data suggests to me that there is a causal relation between the data which could be inferred, regardless of how much you delete. It's much easier by far to try your source data with brute force deletions than to determine causal relation between solar activity and ambient noise.
Oct
12
comment How exactly is “true randomness” defined in the realms of cryptography?
Every event appears to be causal, and the universe appears to be deterministic, but that doesn't mean there's a proximal causal relation between any given set of events. If you select data from solar activity and data from ambient noise, chances are they're causally unrelated. Or at least far enough removed as to eliminate any ability to infer one from the other. Think chaos theory & sensitivity to initial conditions. The sources need not be random themselves if your selection removes causal relationship. A seeming pattern can mean nothing here, where if data is deleted it does mean something.
Oct
6
comment How exactly is “true randomness” defined in the realms of cryptography?
That is insufficient. The fact that there was a relationship there at all means it is possible to predict or infer other data. If, however, you take some data from a randomly selected sound, some from a randomly selected earthquake, etc., then your data should be random.
Oct
6
awarded  Teacher
Oct
6
answered How exactly is “true randomness” defined in the realms of cryptography?