Re: 64bit or 1024bit - will it make a difference?

Colin L. Hildinger (colin@ionet.net)
Sun, 11 May 97 22:41:41 -0500


On Sun, 11 May 1997 23:24:23 -0400 (EDT), Scott Lipcon wrote:

>Well, 1024 is a hell of a lot bigger than 56 bit. Each bit adds a power
>of two number of keys... 57 bit is twice as long as 56 bits... therefore,
>a 1024 bit key is 2^968 times as long as 56 bits. Assuming it takes us 3
>months to crack 56 bits, and assuming our computing power continues to
>increase at the same rate (someone mentioned Moore's Law - computing power
>doubles every 18 months) That says that in the 10 years that you mention,
>our computers will be about 12 times more powerfull,

Nope, check your math. 2^6.67<>12

>so it will take 1
>week to crack a 56 bit key. Using these pretty general assumptions, it
>will take approximately 5 x 10^287 years to crack a 1024 bit key... thats
>a pretty long time!!

Colin L. Hildinger

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