good explanation of domino password strength

[Database Administrator]

I am trying to figure out how to calculate password strength and I am
finding the published explanations are incomprehensible.
In the most detailed explanation, 'distribution' is mentioned without
explaning how to calculate it, and in another place detrimental effect of
dictionary words in a password is not clear. Does anyone have an
understandable explanation of domino password strength?

Thanks,
Jim

[Database Administrator]

Jim Cooke schrieb:
> I am trying to figure out how to calculate password strength and I am
> finding the published explanations are incomprehensible.
> In the most detailed explanation, 'distribution' is mentioned without
> explaning how to calculate it, and in another place detrimental effect of
> dictionary words in a password is not clear. Does anyone have an
> understandable explanation of domino password strength?
>
> Thanks,
> Jim
>
>
What about this:

http://www-128.ibm.com/developerwork...ity/index.html

kind regards

Michael

[Database Administrator]

Jim Cooke schrieb:
> I am trying to figure out how to calculate password strength and I am
> finding the published explanations are incomprehensible.
> In the most detailed explanation, 'distribution' is mentioned without
> explaning how to calculate it, and in another place detrimental effect of
> dictionary words in a password is not clear. Does anyone have an
> understandable explanation of domino password strength?
>
> Thanks,
> Jim
>
>
What about this:

http://www-128.ibm.com/developerwork...ity/index.html

kind regards

Michael

[Database Administrator]

I've read that, and it's actally a simplification of another explanation of
the password strength algorithm.

And there is a line there that is pretty ambiguous for an algorithm:

"In addition, the rating decreases if the password contains anything that
can be programmatically determined to be predictable, for example, words in
a dictionary or repeating characters."

My question is, by how many points does the rating decrease if you have
dictionary words or repeating characters?

Jim


"Michael Richerzhagen" wrote in message
news:gb5rv8$8ip$1@tamarack.fernuni-hagen.de...
> Jim Cooke schrieb:
>> I am trying to figure out how to calculate password strength and I am
>> finding the published explanations are incomprehensible.
>> In the most detailed explanation, 'distribution' is mentioned without
>> explaning how to calculate it, and in another place detrimental effect of
>> dictionary words in a password is not clear. Does anyone have an
>> understandable explanation of domino password strength?
>>
>> Thanks,
>> Jim
>>
>>
> What about this:
>
> http://www-128.ibm.com/developerwork...ity/index.html
>
> kind regards
>
> Michael

[Database Administrator]

I've read that, and it's actally a simplification of another explanation of
the password strength algorithm.

And there is a line there that is pretty ambiguous for an algorithm:

"In addition, the rating decreases if the password contains anything that
can be programmatically determined to be predictable, for example, words in
a dictionary or repeating characters."

My question is, by how many points does the rating decrease if you have
dictionary words or repeating characters?

Jim


"Michael Richerzhagen" wrote in message
news:gb5rv8$8ip$1@tamarack.fernuni-hagen.de...
> Jim Cooke schrieb:
>> I am trying to figure out how to calculate password strength and I am
>> finding the published explanations are incomprehensible.
>> In the most detailed explanation, 'distribution' is mentioned without
>> explaning how to calculate it, and in another place detrimental effect of
>> dictionary words in a password is not clear. Does anyone have an
>> understandable explanation of domino password strength?
>>
>> Thanks,
>> Jim
>>
>>
> What about this:
>
> http://www-128.ibm.com/developerwork...ity/index.html
>
> kind regards
>
> Michael