From owner-freebsd-security@FreeBSD.ORG  Sun Jun 24 18:56:12 2012
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Date: Sun, 24 Jun 2012 13:56:04 -0500
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From: Mark Felder <feld@feld.me>
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Subject: Re: Hardware potential to duplicate existing host keys... RSA DSA
 ECDSA was Add rc.conf variables...
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On Sun, 24 Jun 2012 13:34:45 -0500, Robert Simmons <rsimmons0@gmail.com>  
wrote:

> In light of advanced in processors and GPUs, what is the potential for
> duplication of RSA, DSA, and ECDSA keys at the current default key
> lengths (2048, 1024, and 256 respectively)?
>

I've been able to duplicate keys for years simply using cp(1)

Define "duplicate". Are you asking about some sort of collision? Are you  
asking about brute forcing an encrypted stream and deducing what the  
private key is?