Subject: Re: [Hipsec] rfc5201-bis issue 35: limiting ECC cofactor to 1

From: Robert Moskowitz <[email-masked]>
Date: Wed, 11 Jul 2012 14:28:44 -0400

I agree. This is pretty much all we need to say about this.

On 06/27/2012 01:19 AM, Henderson, Thomas R wrote:
> This was already proposed to the list a while back:
> http://www.ietf.org/mail-archive/web/hipsec/current/msg03462.html
>
> so I'd like to close this issue by adopting the proposed text; specifically:
>
> 1) Section 5.2.7 (Diffie Hellman)
>
> OLD TEXT:
>
>     The MODP Diffie-Hellman groups are defined in [RFC3526].  The ECDH
>     groups 8 - 10 are defined in [RFC5903] and [RFC6090].  ECDH group 7
>     is covered in Appendix D.
>
> NEW TEXT:
>
>     The MODP Diffie-Hellman groups are defined in [RFC3526]. The ECDH
>     groups 7 - 9 are defined in [RFC5903] and [RFC6090]. ECDH group 10
>     is covered in Appendix D.  Any ECDH used with HIP MUST have a
>     co-factor of 1.
>
> 2) Section 5.2.9 (HOST ID)
>
> OLD TEXT:
>
>     ...  For ECC we distinguish two different profiles:
>     ECDSA and ECDSA_LOW.  ECC contains curves approved by NIST and
>     defined in RFC 4754 [RFC4754].  ECDSA_LOW is defined for devices with
>     low computational capabilities and uses shorter curves from SECG
>     [SECG].
>
>     ...  For ECC we distinguish two different profiles:
>     ECDSA and ECDSA_LOW. ECC contains curves approved by NIST and
>     defined in RFC 4754 [RFC4754]. ECDSA_LOW is defined for devices with
>     low computational capabilities and uses shorter curves from SECG
>     [SECG].  Any ECDSA used with HIP MUST have a co-factor of 1.
>
>
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