----- Original Message ----- From: "Michael Cordover" <[EMAIL PROTECTED]>
Subject: Re: quantum chip built

John Denker wrote:
My understanding is that quantum computers cannot "easily" do anything.

Probably one of the best statements so far, certainly QC and easy don't go together very well at this time.

Alex said
Is ECC at risk too?  And are we at risk in 10, 20 or 30 years from now?

At this time pretty much everything is potentially at risk from QC mostly because we know so little about how they really behave. Will ECC-160 fall to QC within 20 years? Probably not, but I wouldn't offer insurance against it. Right now we can safely assume that for our lifetime QC will be less of a threat than classical computation, but my standard recommendation of checking your security in depth at least every 6 months (depending on the safety buffer you have less decrease this) along with some continual critical point examination (e.g. check every paper on cryptanalysis of AES if you use AES) should be more than sufficient. Joe

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