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I read several contrasting analysis on the alleged safety of the Arcfour256 cipher. I'd like to use it in SSH because it's the fastest cipher, but is it actually so easy to break?

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asked 10/26/2011 12:38

jiiins2's gravatar image

jiiins2 ♦♦


6 Answers:
Why is fast so important to you ?

I would stick with the standards rather than doing with one that even has a slim chance of being broken.

Also I would test to see if you can notice any difference in speed.


I hope this helps !
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answered

SysExpert's gravatar image

SysExpert

Thanks. Fast is important because I need to tunnel a lot of web traffic... Any ideas on my question?
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answered 2011-10-27 at 12:06:35

jiiins2's gravatar image

jiiins2

No, it is not very easy to crack. Most of the problems that have existed with ARCFOUR256 have to do with *how* it is used, not due to its inherent weakness. That said, there are attacks and you should avoid it for new applications. How worried are you about someone attacking your session? Government/NSA worried? Or Casual/Script Kiddie worried?
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answered 2011-10-27 at 21:11:15

blu's gravatar image

blu

I'd say casual worried... Is there anything particular I should or shouldn't do when using it with ssh to make tunnels?
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answered 2011-11-30 at 07:57:05

jiiins2's gravatar image

jiiins2

You should be okay. If you are tunneling, I would try to re-create the tunnels periodically. The longer it exists, the longer an attacker has to figure out the key.
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answered 2011-11-30 at 08:29:39

blu's gravatar image

blu

Thanks!
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answered 2011-11-30 at 09:07:25

jiiins2's gravatar image

jiiins2

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Asked: 10/26/2011 12:38

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Last updated: 11/30/2011 08:48