[dm-crypt] zuluCrypt v3.0 released.

Arno Wagner arno at wagner.name
Thu Oct 6 16:27:12 CEST 2011

On Wed, Oct 05, 2011 at 09:27:26PM -0400, .. ink .. wrote:
> Thats where i got the key file length from. Since my program interfaces with
> cryptsetup interactively, i though creating a key file with the maximum size
> allowed will be more secured.
> Whats the optimum key file size with the above output?
> Whats the optimum key file size in general?

There is not really one, as longer is cheap and cannot be worse.
My rule of thumb is: Conservative Entropy estimation as basis
and then use 2x ... 10x that length.

> The above output seem to suggest 32 bytes files but whats the harm in using
> 512 bytes?(the maximum allowed)

Nothing at all. Go for 512 Bytes. 

Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno at wagner.name 
GnuPG:  ID: 1E25338F  FP: 0C30 5782 9D93 F785 E79C  0296 797F 6B50 1E25 338F
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans

If it's in the news, don't worry about it.  The very definition of 
"news" is "something that hardly ever happens." -- Bruce Schneier 

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