Re: [IPsec] New PAKE Criteria draft posted (def. of gateway)

Yaron Sheffer <yaronf.ietf@gmail.com> Sun, 28 March 2010 13:17 UTC

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Date: Sun, 28 Mar 2010 16:17:27 +0300
From: Yaron Sheffer <yaronf.ietf@gmail.com>
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To: Kaz Kobara <kobara_conf@m.aist.go.jp>
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Cc: ipsec@ietf.org
Subject: Re: [IPsec] New PAKE Criteria draft posted (def. of gateway)
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Hi Kaz,

Sure. That would be an appropriate title.

Thanks for helping to clarify this point!

Regards,
	Yaron

On 28.3.2010 15:06, Kaz Kobara wrote:
> Hi Yaron,
>
> I see.
> Your "client-gateway" means "client-gateway-AAA".
>
> OK, now we can go back to the title.
>
> Why don't you make it more specific, like
> "Password-Based Authentication between Gateways in IKEv2: Selection Criteria
> and Comparison" or something like that?
>
> This is really what you want to do, I bet.
>
> Regards,
> Kaz
>
>> -----Original Message-----
>> From: Yaron Sheffer [mailto:yaronf.ietf@gmail.com]
>> Sent: Sunday, March 28, 2010 5:41 PM
>> To: Kaz Kobara
>> Cc: ipsec@ietf.org
>> Subject: Re: [IPsec] New PAKE Criteria draft posted (def. of gateway)
>>
>> Hi Kaz,
>>
>> Most of the WG members are aware of the whole picture:
>>
>> - The standard is clear that PSK must not be used with passwords.
>> - The standard contains a good solution for the client-gateway case,
>> which is already widely implemented, namely EAP. EAP is implemented by
>> many AAA servers, is available on endpoints and simple to integrate into
>> gateways, and is therefore the best way to set up a remote access
>> solution if you have more than, say, 5 users.
>> - Having two ways to do the same thing (e.g. IKE+EAP with a mutual auth
>> method, and IKEv2 with the new proposed mode) is bad for
>> interoperability and ultimately, for the success of the standard.
>>
>> Thanks,
>> 	Yaron
>>
>> On 28.3.2010 9:40, Kaz Kobara wrote:
>>>>     So is there a reason you don't want to fix this "between clients
>>>> and gateways"?
>>>
>>> (As most of this WG members have already noticed)
>>> PSK in IKE is foolish in the sense that it is vulnerable against
> off-line
>>> dictionary attack while using heavy DH calculation.
>>>
>>> There is no reason not to fix this foolish PSK (regardless of "between
>>> gateways" and "between clients and gateways".)
>>>
>>> Kaz
>>>
>>>
>>> _______________________________________________
>>> IPsec mailing list
>>> IPsec@ietf.org
>>> https://www.ietf.org/mailman/listinfo/ipsec
>
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