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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