# Re: Key entropy, stream entropy, block entropy, block population entropy AKA uniique stream length

*From*: clark <clark@xxxxxxxxxxx>*Date*: Sat, 10 Feb 2007 05:50:02 -0800

On 10 Feb 2007 04:11:42 -0800, jt64@xxxxxxxx wrote:

On 10 Feb, 12:33, clark <c...@xxxxxxxxxxx> wrote:<snip>

You don't understand entropy, do you?

Yes i do in a binary with the given length x the entropy is 2^x, in

plaintext english the number of possible unique states a binarystring

of that *SPECIFIC LENGTH*

You should though try to decode the meaning of *SPECIFIC LENGTH* and

try to logically deduce the connection to *KEYEXPANSION* and

*SHUFFLES*

If the key expansion or shuffles are generated from an algorithm only

and do not include input from a hardware RNG or cryptographically

sound CSPRNG like /dev/random or from another entropic source like

random mouse movements or the outcome of rolling dice... things like

that, then what is there to decode?

You cannot derive entropy where none exists.

I do not hold high hopes that it will enlighten you, the least.

But, then again, you appear to be the one who needs to be enlightened.

How are your high hopes doing with that issue?

I mean... you use the word constantly... but you appear to not

understand what it means, particularly as regards crypto.

Blah blah blah

Well... yes... that is all you are doing. Why don't you say something

knowledgable about entropy?

Really. Instead of speaking about it using terms you made up and have

no basis in reality, why not try to actually apply the real meaning to

what you are saying.

Then you would quickly see that maybe your high hopes and dreams and

shmeems and fleems about entropy may indeed be true in some other

parallel universe, but not here on planet earth.

.

**Follow-Ups**:

**References**:**Re: Key entropy, stream entropy, block entropy, block population entropy AKA uniique stream length***From:*David Taylor

**Re: Key entropy, stream entropy, block entropy, block population entropy AKA uniique stream length***From:*jt64

**Re: Key entropy, stream entropy, block entropy, block population entropy AKA uniique stream length***From:*John Hadstate

**Re: Key entropy, stream entropy, block entropy, block population entropy AKA uniique stream length***From:*jt64

**Re: Key entropy, stream entropy, block entropy, block population entropy AKA uniique stream length***From:*r.e.s.

**Re: Key entropy, stream entropy, block entropy, block population entropy AKA uniique stream length***From:*jt64

**Re: Key entropy, stream entropy, block entropy, block population entropy AKA uniique stream length***From:*clark

**Re: Key entropy, stream entropy, block entropy, block population entropy AKA uniique stream length***From:*jt64

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