Re: blowfish's keylen

Bruce Schneier (schneier@counterpane.com)
Wed, 01 Jul 1998 23:47:04 -0500

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At 12:23 AM 7/2/98 -0100, Hamdi Tounsi wrote:
>in various papers decribing blowfish, it was mentioned that the key can
>be as long as 448 bits (14 long words). but in the key setup routine,
>the P-array elements (18 long words) are xored cwwith the key bytes (cycling the
>key if it is shorter than the P-array size) : the size of the P-array is then
>18*4*8 = 576 bits, so why 448 bits ?

I never trusted the last dwords. And honestly, at that point key length is
irrelevent.

Bruce

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