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 :: Mailing Lists

[ILUG] SSH dictionary attacks.

[ILUG] SSH dictionary attacks.

Aine Douglas aine.douglas at gmail.com
Wed Aug 23 21:21:59 IST 2006


On 8/23/06, Stephen Shirley <diamond at skynet.ie> wrote:
> Hum. Ok, upon re-reading it and another one of your replies, it seems
> you are advocating using normal passwords rather than ssh keys +
> passphrases. Isn't that trading the chances of a user screwing up
> against those of a dictionary attack being successful though?

Paul is very correct to a certain extent.... the more convoluted you
make security the weaker the holes that are left in it.

You can actually control the pasphrases used to protect keys if you
issue the keys from a corporate controlled CA, which is where I was at
right back at the start of the thread when I queried support in SSH
clients for PKCS12 keystores.

I've never been much of pin protected hardware tokens, and in security
circles, PKCS12 is typically referred to as smartcard emulation.
Smartcards for example usually can have their pin retrieved by reading
the post-it on them. Its like the oldest problem with bankcard pins.

Even in Pauls scenario of making secure password policies and having
them centrally enforced, try issuing to a non techie dept and give it
a month and check the back of peoples keyboards.... bingo....
passwords.

Simple things work.... hence the bunch of korean schoolkits dictionary
attacking my feckin' servers :,-(

Aine.



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