Fwd: Seperate RSA subkeys for decryption and signing or one for both?

[Nicholas Cole]

On Tue, Dec 4, 2012 at 5:32 PM, Hubert Kario <hka at qbs.com.pl> wrote:
> On Tuesday 04 of December 2012 16:07:26 Nicholas Cole wrote:
>> On Tue, Dec 4, 2012 at 12:19 PM, Hubert Kario <hka at qbs.com.pl> wrote:
>> > On Monday 03 of December 2012 12:41:10 Hauke Laging wrote:
>> >> Do any problems arise with the smartcard if the same key shall do
>> >> different
>> >> tasks?
>> >
>> > Keys can become "used up" so it entirely depends on how often you use it.
>> >
>>
>> Do you have a reference for this?
>
> Sorry for double posting, here's some reference:
> http://security.stackexchange.com/a/18242/3306
>

Ah. That's an attack on the Hash function, not the key.  And even
then, it seems far too difficult to be realistic, assuming that I read
it correctly and assuming it is correct!

N