Of course, it is possible to hash the result with the standard SHA
algorithm. Or, it is also possible to encrypt data with the given key
and use hash over encrypted data.
All in all, problem is solved.
Thanks for useful advice.
On Jan 30, 5:59 pm, mihailo <[EMAIL PROTECTED]> wrote:
> Thanks, Jeffrey.
>
> Will it be much easier to crack than SHA-1 or SHA-2 ?
>
> On Jan 30, 5:45 pm, "Jeffrey Walton" <[EMAIL PROTECTED]> wrote:
>
> > Hi Mihailo,
>
> > Geoff is right on. Keep in mind the HMAC output ('keyed signature')
> > will be the size of the cipher's block size (typically 64 or 128
> > bits), rather than a conventional signature size. For example, 160
> > bits (SHA-1) or 512 bits (Whirlpool).
>
> > Jeff
>
> > On 1/30/08, mihailo <[EMAIL PROTECTED]> wrote:
>
> > > Hello.
>
> > > I would like to know if there exists some hashing function that uses a
> > > key for calculating a result. Or, is there any hash function H with
> > > the following description : H(data, key1) does not produce the same
> > > result as H(data, key2) ?
>
> > > Similar as encryption, but its result should not be reversible.
>
> > > Thanks in advance,
> > > Mihailo
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