Re: [pkix] Question about Curve P-192

Russ Housley <housley@vigilsec.com> Thu, 10 May 2018 17:30 UTC

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From: Russ Housley <housley@vigilsec.com>
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Date: Thu, 10 May 2018 13:30:26 -0400
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To: Ernst G Giessmann <giessman@informatik.hu-berlin.de>
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Subject: Re: [pkix] Question about Curve P-192
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Ernst:

Of course, this technique works.  That said, I am not aware of any algorithm identifiers that make use of the P-192 curve for digital signature or key agreement.

Russ


> On May 10, 2018, at 1:24 PM, Ernst G Giessmann <giessman@informatik.hu-berlin.de>; wrote:
> 
> Yes, there is a standardized way: 
> Pick up a corresponding hash function, in case of P-192 it should be SHA-224 and take the 192 left most bits of the hash value as the input to the EC sign primitive.
> The correspondig signature suite can be defined with ISO 14888-3, which allows the specification of the algo (e.g. EC-DSA, EC-KCDSA or whatsoever), the curve and the hash function.
> Kind regards,
> /Ernst.
> 
> Am 2018-05-10 um 19:07 schrieb Denis:
>> Hello everybody,
>> 
>> Curve P-192 is specified in FIPS PUB 186-4 (Digital Signature Standard (DSS)).
>> 
>> There is no "SHA-192" hash function defined in FIPS PUB 180-4 (Secure Hash Standard (SHS)).
>> 
>> Is there any standardized way to use a hash function with Curve P-192 ? 
>> 
>> Is there any RFC or any another document that specifies a cryptographic suite for Curve P-192 ?
>> 
>> Denis
>> 
>>  
>> 
>> 
>> 
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