libgcrypt: Length of IV

Blumenthal, Uri ublument at
Mon Apr 23 16:09:14 CEST 2007

> Should the IV be of the same length as the key
> for a given symmetric cipher or can it have any
> length?

IV should be equal in length to the block size of the cipher
(not the key size). Yes IV can be of a different length - but 
unless you fully understand the implications, 
I advise against it.
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