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Author Topic: 2048 bit ssh-keygen  (Read 4282 times)
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« on: August 08, 2009, 02:46:38 PM »

When I try to do:
#ssh-keygen -t dsa -b 2048
Get the msg:
DSA keys must be 1024 bits

On another much smaller/less powerful *nix box I have here (the Slug), I can make 2048 length keys.  How do I achieve that?

Cordially, CqCn

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« Reply #1 on: August 08, 2009, 06:35:53 PM »

Are you sure the DSA standard permits keys beyond 1024 bits?  I know the original DSS did not.  (This has been a source of controversy with the GPG crowd for years -- whether the signing key it generates by default is secure.)  FWIW, I just tried your ssh-keygen on my Ubuntu desktop and got the same error.

Could you be thinking of RSA keys, which can be generated in any keylength within reason, and are typically 2048 or 3072?

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