Re: Main difference between PRP and PRF
- From: dwmalone@xxxxxxxxxxxx (David Malone)
- Date: 22 Jul 2011 13:17:21 +0100
Alex <alex33689@xxxxxxxxxxxxxx> writes:
On 22 Jul., 10:53, dwmal...@xxxxxxxxxxxx (David Malone) wrote:
This functions with this property are known as "injective" or
"one-to-one" and it has lots of useful implications:
For the PRF's it can't be guarantee because as far as I know they are
imlplemented using hash or hmac functions.
PRF's aren't "injective" because the different input paramters map to
the identical output value! Is this correct ??!!
Yep - PRF wouldn't usually be injective. A permutation would be.